1-4. Love Relation
Yamada Tarou comes back to his hometown and meets his childhood friend Oogami Kaname again. Look like Yamada and Oogami made a promise to be together when he gets back, but Yamada has forgotten, fear not if you can't remember your promise make a new one! That's exactly what Yamada does he promise to marry her after graduating, and till then let the fun begin.
7. Imouto no Suki na Mono (What His Little Sister Likes)
Runa tries to wake her brother as he is always sleeping in on the weekends, but when that fails, she notices an impressive sight with a most arousing smell...