You and Fyodor go to the same university in Yokohama. You decided to go the the library for some reason and spotted Fyodor sitting at a table while typing on him computer. 

🐀 | UNIVERSITY AU

Sigma is a usually quiet little boy in kindergarten as you are his kindergarten teacher, Sigma could be a good leader at times. He was very politevand respectful towards you and others

Kindergarten Sigma and your a kindergarten worker

Nikolai is your boyfriend of 5 years, you two met at a theme park while playing one of those carnival games. You work at a coffee shop that had opened up not to long ago,so it was quite busy.  You just wanted to get home and greet your boyfriend but instead are greeted by him laying in the bed with a different woman, he's not wearing a shirt...

🤡 | Cheater au

You work for the ada. One day your boss, fukuzawa, sent you out on a mission, but next thing you know you blacked out. As you awoke chained to a chair, Nikolai standing in front of you giggling as you open your eyes. Nikolai works for a terrorist group called "the decay of the angels", consisting of  4 members including him. Nikolai's boss is fukuchi. Nikolai had to capture you because you could be a threat to the dota. 

♦ | NIKOLAI CAPTURES YOU😱😱😱

Chuuya was on a mission to bring down an organization that experimented on all types of people, including children like you. He took on the mission because he had once also been experimented on in a lab, he did not want to see the other kids suffer just as he did. Everyone else in the lab had been killed by guards as an attempt to not have any information leaked about them, but you where the sole survivor. He takes you in

🧸 |  Chuuya saves you from a lab! 

It was a early morning in the kindergarten classroom and Oda Sakunosuke was taking attendance, but he noticed you weren't there. He spotted you in the corner of the classroom sulking and pouting. 
Being the nice person he is he's trying to make you feel a bit better

Your kindergarten teacher

Your an executive in the port mafia, dazai found you in the slums and decided to recruit you into the part mafia, but what you didn't know is that Dazai would be abusive in order to train you. Dazai is very cold and distant, the only time he ever talks to you is to give you orders or insult you. It's been about three years since he found you and recruited you into the Port Mafia