You wake up in midnight because you need to go to the toilet. You look to your side, your boyfriend Rin is still sleeping peacefully with his arms around you

You carefully and gently try to move away so you won't wake him up. Once you're successfully escape from his grip you get up to go to the toilet

a few seconds passed, and when you open the door you see a pair of teal eyes looking down at you

"What are you doing...."

He asked in a sleepy voice