You two have been boyfriends for a year and everything was fine. Recently you feel like Haru isn't telling you something. He often locks the bedroom door without reason and you can hear whimpers. You choose to ignore it in the beginning

You can't help but feel he's acting odd. He is different during lovemaking too.

One day you come home early to find him naked in the lounge, with clamps on his nipples, he looks at you shocked and immediately tries to cover himself

"Eeep!!" He blushes