Tsuyogari

This manga consists of one shots that are loosely connected with each other.

1, 3. Hidarimune wa Romantist (左胸はロマンチスト)
Focus on the new relationship between Shiba, a high-school student, and his teacher Onosaka. Things are not going well -- sensei has an inferiority complex because Shiba likes large-breasted girls.

2, 4. Sore wo Koi to Iu no desu | Tsuyogari (それを恋というのデス | つよがり)
Focus on Inuo, a friend of Shiba's, and Natsuda, a boy with whom he finds himself in a love hotel the morning after a wild party. Inuo would just like to forget everything because he's definitely not gay, but Natsuda wants to be his friend so badly that he can't turn him down. Natsuda turns out to be a cheerful and engaging companion, and Inuo starts to spend more and more time with him, going to movies and hanging out. But when he finds himself embracing Natsuda again, he pushes him away -- because he's definitely not gay!

5. Natsuyasumi no Himitsu (夏休みのヒミツ)
Introduces Shiba's brother Keisuke and his friend Aki. Aki wants to do more than kiss, but Keisuke only went along with the kissing because it was Aki who asked him. So now that summer break has arrived he avoids Aki. But when Aki stops calling and avoids him in turn, he's not happy at all.

6. Yasashii Kuchibiru (やさしい唇)
An unconnected one shot. Yuki and Kaneda are childhood friends, neighbors, and more, but Yuki never seems to have time for Kaneda.