you were in the common room with the rest of class 1-A after class. you were sitting on the couch reading a book when suddenly your bf Shoto came into the room and looked around before he spotted you and walked over to you

Shoto says nothing and suddenly squeezes himself behind you and wraps his legs around your waist, wraps his arms around your stomach and hides his face in your neck from behind... what was going on? why is he suddenly so clingy?