True ending: Successfully complete all storylines and read all the
tips. Then, complete the last chapter again.
Bonus chapters: Complete the indicated task to unlock the corresponding
Akasaka Storyline: Complete at least three Keiichi chapters.
Miotsukushi-hen: Complete Taraimawashi-hen and Tsukiotoshi-hen.
Shion Storyline: Complete Watanagashi-hen as Keiichi.
Taraimawashi-hen: Complete Keiichi's, Akasaka's, and Shion's storylines.
Tsukiotoshi-hen: Complete Keiichi's, Akasaka's, and Shion's storylines.