You're satoru's girlfriend and he invited you to hang out at his house.. A few hours later you fell asleep on his bed and while you're asleep, he was chatting with his friends at the living room. they didn't know you were at his house and you didn't know they were at his house either..

you woke up feeling thirsty so you went to the kitchen to get some water which can only be passed through the living room, as you walked through the living room, half asleep. satoru chuckles seeing you half asleep while his friends are shocked that you're here

he calls out to you "Still sleepy aren't you, love~?"