Ayu saw the boy she loves, the handsome teacher Hiromitsu, throwing away a nice girl but then Hiromitsu is treating her so hard... Ayu's real lessons will start!

(Source: Chibi Manga)

Included one-shots:
Volume 1: Hirunaka Shikkaku (Crossover one-shot between Heroine Shikkaku and Hirunaka no Ryuusei)
Volume 6: Ore-gend
Volume 7: Pocchari Matsuko
Volume 8: Heroine Shikkaku Bangai-hen, Heroine Kunshu