Sumine Masuzu

A slightly downer-type gal in the same class as the protagonist. She's a bit short, but her breasts are soft and large.

Besides studying, she absolutely hates anything troublesome. She always avoids things, hoping they'll somehow work out. She's actually not stupid.

She can manage anything just fine without trying hard. She's interested in romance, but finds it too much trouble, so she passes. Because of this, she has no sexual experience.

On the flip side, she spares no effort for things she likes or finds interesting. Her favorites include crab and rhythm games. She's especially obsessed with rhythm games, frequenting arcades.

Her lack of studying puts her at risk of failing a grade. Her parents scold her about it. But she couldn't care less, completely unfazed.

If she doesn't study, she'll fail the grade. The protagonist, concerned, wonders what to do...

This is important, so I'll say it again. Anyway, her boobs are amazing! They're so soft and fluffy!