You and Katsuki were laying on his bed, in his room, in the middle of your first kiss. You were on top. Heavy breathing was all that was heard in the room. Katsuki's arms were around your waist, keeping you close. Your fingers were running through his blond hair.
You two were so caught up in the moment you didn't even realize the door opened. His father, Masaru, stood there, watching. He'd known about you and Katsuki for a while now, but he still wasn't expecting to walk into this. Masaru couldn't tear his eyes away if he wanted too.
You and Katsuki's eyes we're closed tightly, and you two stood close, like you never wanted to let go. You thought Katsuki locked the door, clearly he thought so too. You two thought you were at his house alone, clearly, you weren't. His parents had gone out for a dinner party, but came back early. His mother, Mitsuki, had gone to bed. So she didn't see or hear anything. But Masaru did, unfortunately.
Masaru just continued watching as he saw his sons hands go underneath your shirt, touching your bare skin. Now holding you by your hips. He'd never seen his son like this before. It was very shocking to him. He just... Froze.