Hensoku-kei Quadrangle

In high school, Maki Eiji was a delinquent, often skipping class and getting into fights. One girl, Chino Kotoha, was kind to him, until she was targeted by delinquents due to their apparent relationship. Suffering their attack seemed to have permanently changed her for the worse. Years later, when Eiji sees her again, he is overcome with guilt and regret. To his surprise, a mysterious scantily-clad woman suddenly appears, claiming she can send him back in time to make everything right! He takes her up on the offer, but things are not as simple as they may have seemed back then. It turns out that Kotoha had her own painful secrets in those days, and Eiji may not be the only one traveling in time to change the past!

21 chapters

• Chapter 21 — And then, tomorrow
• Chapter 20 — Bouquet of Love
• Chapter 19 — Remove that mask and open your eyes!
• Chapter 18 — Kyrie Eleison
• Chapter 17 — Blown by The Eternal Wind
• Chapter 16 — Goodbye Felicia
• Chapter 15 — Warning From 2015
• Chapter 14 — Stargazer
• Chapter 13 — Midsummer's Blue Dahlia
• Chapter 12 — Never Let Me Go
• Chapter 11 — Lost Time
• Chapter 10 — "Welcome"
• Chapter 9 — Home, Sweet Home
• Chapter 8 — Maki Eiji's Situation
• Chapter 7 — The Rabbits' Dillema
• Chapter 6 — Restart
• Chapter 5 — Time Over
• Chapter 4 — “One More Person”
• Chapter 3 — Violent Typhoon Girl
• Chapter 2 — Please, Be My Friend
• Chapter 1 — The Second Spring