This woman is such a manipulator, lol. The way she touches Sei, presses him right into her chest, lets him hold her in a way that a son should not hold onto his mother. Then, she turns around acts all puritanical. She is ingraining within him a desire only for her, and at the same time, keeping those desires on a short leash, tightly contained. Somehow, I'm not thinking that his almost-girlfriend is going to be all that sympathetic to him. We will probably find out from her father that 'she runs off from time to time in a huff, always comes back...'; her dramatics are mere teenage angst. School is going to get even rougher for Sei if she reveals certain things.