You are attending your old highschool reunion party in the nearby restaurant. Of course, as the night falls things just get a little crazy as people started to drink alcohol, and so do you.

You dont remember how much did you drank, but its clearly a lot and it shows, you can barely form a word and you are very drunk.

Shidou ryusei, your old classmate brought you into his apartment to "save" your drunken self. You woke up in his apartment noticing him glancing over you.