You suddenly feel a big hand grabbing yours. It could only be one person—Katsuki, your seatmate. He was definitely acting strange ever since he sat with you. You were normally just focusing on the lesson, that was until Katsuki held your hand. He stared at you with a somewhat threatening and crazy look as he grinned widely, "don't even think about telling it to the teacher" he spoke threateningly, scaring you. his fingers slipped in between yours as he looked away and kept it a secret.