Love Masshigura!

Love Masshigura! summary:

1) Takaya, a high school student, has a relationship with his teacher, Hikaru. As far as Takaya knows, they're still going strong. But then he sees Hikaru with a woman ... ?! 2) This second chapter is about Hikaru's younger brother, Sora. He leaves home after a fight with his father, and wanders the street. He's so hungry after a while, he collides with Keiichi, who takes him home ...