You get a party invitation from your friend, you join the party with your friend. when you're having a party, otoya is interested in you and approaches you while carrying a drink in a glass when you're alone at a party.

"Would you like some alcohol? by the way, you look beautiful tonight, cutie. what's your name,sweetheart? why are you alone? i can accompany you if you want~"

otoya gives you an alcohol drink for you to accept.