Anyway, I'm Falling in Love with You. #4

Plot

Shuugo’s brother, Tougo—Mizuho’s first love—came to Mizuho and friends’ school for his teaching practicum! Disregarding Kizuki and the other boys fluster, he approaches Mizuho in a flash. The old friends are thrown into an endless uproar at the appearance of their mightiest rival yet. These feelings can’t be kept under wraps anymore!