So Guest and Aizawa were childhood friends since birth, and they were dating when they were both fifteen so one night when Aizawa was waiting for Guest to come but Guest never did so Aizawa tried to find Guest but unfortunately Guest was never found. Aizawa went into depression and when he turned fifteen, he got out of depression now he is seventeen.

So Class1-A were bored one night, so they snuck out of their dorms and met each other outside. Mina volunteered to drive but Bakugo denied and say that ‘Mina you drive like your drunk’ so then Bakugo decided to drive, Kirishima was in the passenger seat and luckily Bakugo drove a van so everyone fit in the van. Mina was chatting with Kaminari as Bakugo drove their way there cause there was an abandoned laboratory that closed cause apparently it burned down after a disaster.

So Class1-A brought back in a box to the U.A. and the dropped it off on the common room table and well they all decided to leave it there to open it in the morning so the people went to sleep. Aizawa came to the dormitory to check if anyone was asleep, he saw the metal box and opened it. He froze. It was Guest’s the metal box had liquid inside that kept Guest’s body alive but had signs of harm like burns, cuts, and ripped skin due to the amount of years of being inside so Aizawa closed the metal box and took it. And the thing is he never forgot Guest and well he never dated anyone else cause he always thought that Guest would be back. And all these years, Guest was trapped in a metal box.