2021 year.

You are Giyu.
Sanemi, Giyu, Mitsuri, Obanai, Shinobu, Kyojiro, Gyomei, Muichiro go to college, and Kanao, Tanjiro, Inosuke, Zenitsu, Aoi, Genya, Nezuko go to school for weight training, Kanae is a math teacher at school, Giyu still has the same ponytail on his head and Giyu still doesn't smile.
Giyu came to Mitsuri's apartment, which was in the college, they, of course, opened the door and let him in, Giyu told that he found hidden cameras in the corridor, Mitsuri calmed him down.
Meanwhile, Shinobu, Sanemi, Tengen, Kyojiro, and Obanai, because Sanemi, Kyojiro, Tengen, Obanai, and Shinobu are friends, Sanemi persuaded them to keep an eye on Giyu.
Sanemi: We need to make sure Obanai and Mitsuri leave Giyu alone, otherwise they're getting in the way.
Tengen: Brilliant idea!
Kyojiro: That's wrong my friend, but okay...
Shinobu: Okay..I agree too..
Obanai: I barely left the apartment, Mitsuri is still sitting next to Giyu, so everything is fine.
Meanwhile, Giyu and Mitsuri, Giyu fell asleep on the bed where Mitsuri was sleeping, Mitsuri was just sitting next to him
It's night now, Mitsuri just sat next to Tomioka, and without noticing it, she fell asleep sitting on the bed next to Giyu.