Tachibana x Mizuki
Zenin Kiritsu! Shiritsu BL Gakuen Koutou-Gakkou
～Tachibana × Mizuki hen～
Story and Art : Shinta Harekawa
Publisher : Home-Sha Inc.
Set after the events of the main story, the story centers on Mizuki, still the hardworking student with the goal to be first place during the upcoming term. Though now on friendly terms with Sousuke, Mizuki has his own reasons for aiming for the top place, even if it means working with Toshiki who often gets on his nerves but has the same goal as his.
As the 30th annual sports festival aka BL festival is announced, Mizuki and Toshiki become closer than ever, and Mizuki starts to realize his partnership with Toshiki may be more than just business.