1-6. Oh Imoto (大妹)
She loved to scrub her onii-chan's back when they were little. Now they're older, yet she's still fixated on him. When onii-chan refuses to bathe with her she charges into the bathroom: "I'm bigger now, so I can do it right!"

7. Shuugaku Ryokou (修学旅行,School Excursion)
8. Densha de Itazura...