My Girlfriend is Yingriri

"what happened?"

Kiyosuke Hashima looked down.

Ebina raised her small face, summoned up her courage and said, "Shall we go to the park to practice together tomorrow night?"

"You should ask Xiaobu about this." Kiyosuke Hashima looked at Hamsterbu and kicked the ball over, "After all, it's a competition between you and Xiaobu."

Xiao Bu hesitated for two seconds, then quickly made a decision, raised his hand to wrap his hair that was blown by the wind around his ear, and said softly, "Then let's go together, I also want to practice more."

No way, Ebina looked over with eyes like a cat begging for a small fish, no one can refuse with a heart of stone, right?

Kiyosuke Hashima nodded lightly: "Then go together."

Ebina breathed a sigh of relief, "Senior, Xiaobu, see you tomorrow!"

……

The campus life on the second day has been calm and flat.

In a blink of an eye, it was school time again.

Kiyosuke Hashima couldn't leave today, but was arrested by the teacher and dragged him to help carry things.

After all the trivial matters were dealt with, the sun had already started to set. Kiyosuke Hashima returned from washing his hands in the bathroom, picked up his schoolbag, and was about to go back to the apartment when the phone in his pocket vibrated suddenly.

Kiyosuke Hashima took out his mobile phone and found that it was a message from Kato.

Chapter 899 Big Campus Adventure

"Hashima-kun, have you returned to the apartment?"

After receiving Kato's message, Kiyosuke Hashima, who had just walked to the school gate, stopped immediately.

"No, still in school."

Kiyosuke Hashima sent another message: "Not feeling well?"

After a few seconds, a new message will appear on the screen.

"It's not uncomfortable."

Student Saint quickly said:

"Umm... I want to ask Hashima-kun for a little something."

"Cheerleading training is over, and when changing clothes, it seems to be ignored by everyone again."

Kiyosuke Hashima didn't respond for a while: "What's wrong?"

It took several seconds before Megumi Kato sent a message.

"The door of the locker room cannot be opened, it seems to be locked."

"..."

This kind of thing can be encountered by you, the sense of existence is really too low!

"Don't laugh."

Student Shengren sent an emoticon pack with a bandaged mouth sealed.

"What should I do if I can't help it?"

Kiyosuke Hashima couldn't help laughing, the weather was calm and the wind was breezy, Zhizhu was in his hands, and he never thought that there would be a day when he was begging for help, so he couldn't help smiling.

"You can only laugh for 1 minute at most."

"Thank you Kato-sama for your generosity."

"..."

"I understand the situation." Kiyosuke Hashima took a light breath, turned around and walked towards the campus, "Where is the locker room, I'll go there."

sunset.

The sky is full of sunset clouds.

The huge campus has become quiet, and most of the people have left, but there are still teachers who stay in the school to patrol and check.

Kiyosuke Hashima found the teacher Kiko Suzuki, got the key from the other party, and quickly walked to the door of the women's locker room where Kato was.

"Bang bang."

Raising his hand and gently knocking on the door, Kiyosuke Hashima whispered, "Kato?"

"Hashima-kun, I'm here."

Kato Megumi's voice came from inside the door.

"I got the key, now open the door."

Kiyosuke Hashima opened the door with a key, pushed the door and walked in. The layout of the men's and women's locker rooms was almost exactly the same. For Kiyosuke Hashima, who had been to the women's restroom, there was no psychological pressure at all.

"reading a book?"

Kiyosuke Hashima looked surprised.

I thought that when I entered the door, I would see Kato playing with the phone calmly, but I didn't expect Kato to be reading a book at all.

"It's the homework left by the teacher today." Kato held a pencil in his hand and pursed his pink lips and said, "It just so happens that I'm free now, so I finished it in advance, so I can watch TV at night."

Kiyosuke Hashima walked up to Megumi Kato, and found that Kato was doing his math homework, and then... saw two mistakes at a glance.

"This question is wrong."

"Well?"

"A permutation should be used here, not a combination."

"I don't understand." Kato looked up, with a slightly troubled expression on his face, "The teacher sounded very simple in class, and the sample questions in the textbook also looked very simple. When I was doing my homework, I realized that the questions were super difficult. , I don’t even know if I understand it or not.”

It is indeed the truth of the universe, the cornerstone of all things, and all beings are equal before mathematics.

Even the sage classmate sitting on the frosty sky is helpless and distressed when facing mathematics.

"The reason why permutations and combinations appear in the compulsory mathematics of high school is because it is the basis of probability. It's really not difficult..."

Hajima Kiyosuke decided to give Kato a supplementary class. Trigonometric functions, conic sections, and limit inequalities were things that he couldn’t explain for a while, but the permutations and combinations were really simple—the maximum number given by the question stem was only a few tens, and sometimes You can even use exhaustive enumeration to list all the answers. Unlike climbing the technology tree, you need to unlock the pre-knowledge points to learn. The only operations that appear in it are elementary school multiplication.

Just like swimming and cycling, once you master it, you can basically go on a smooth journey without any problems.

As for those who can't learn to arrange and combine... Obviously, logical thinking is not strong enough.

Kiyosuke Hashima talked about the logic rules for a while, when he suddenly heard the sound of footsteps approaching from outside the door, he subconsciously closed his mouth.

If a boy appeared in the women's locker room, it would be a little troublesome to be discovered.

The faint voice of conversation came in from outside the door, it should be the teacher who is in charge of patrolling the school.

Kiyosuke Hashima and Kato sat together, keeping silent, and after a while, the footsteps of the patrolling teacher outside the door quietly disappeared.

"Hashima-kun, it's getting late, let's go back first."

Kato Megumi said softly.

Kiyosuke Hashima glanced at the time on his phone, it was already 06:30 in the afternoon, the sky outside had already darkened, and the twilight began to fall quietly.

"Let's go."

Hashima Kiyosuke got up and walked to the door, reached out to hold the doorknob, the expression on his face suddenly froze.

Megumi Kato, who was following behind him, tilted his head slightly, "Hajima-kun?"

"call……"

Hashima Kiyosuke closed his eyes, took a light breath, and his expression became serious: "Next time, let's study in the classroom."

"Eh?"

"The door won't open."

Kato Megumi: "..."

"It should be the patrol teacher who passed by the door just now, and unexpectedly locked the door."

Kiyosuke Hashima was a little bit annoyed, he knew this would happen, so he left directly just now, it really is a place of right and wrong, we can't stay for long, the ancients sincerely do not deceive me.

"It feels a little troublesome." Kato Megumi pursed her pink lips, "Even if it's Shiyu senior or Ying Lili, they should all go back, right?"

Needless to say, senior, the members of the home club must have left the school long ago.

There is still a possibility for Tari.

"excuse me, may I ask."

Kiyosuke Hashima took out his mobile phone and sent a message to Eirari.

"where is it?"

Ying Lili came back with a message soon, "I just got home, why did you ask me where I am?"

Everyone has already gone home, and it would be very troublesome to call Tari to come over and open the door. Kiyosuke Hashima silently crossed out the option of 'call Tari'.

"Come to the park for a run at night?"

"Give up, it's impossible, leave."

"..."

Kiyosuke Hashima immediately sent another message to Kiko Suzuki, but unfortunately the teacher didn't know what he was busy with, so he never replied.

"Hashima-kun, don't worry."

Kato was as calm as ever, as if he didn't care about the predicament in front of him at all.

Hajima Kiyosuke walked around the locker room, walked to the window, and suddenly focused his eyes.

"This is the second floor, right?"

"It's too dangerous." Megumi Kato instantly understood Kiyosuke Hashima's thoughts, and Liu Mei frowned slightly, "It will hurt."

"I definitely won't jump on the third floor. If it's on the second floor, there will be no problem."

The locker room is located on the second floor, and the windows can be opened directly. Kiyosuke Hashima thought about it silently. With his current physical fitness, he would have no problem jumping down.