Midare Setsugetsuka -Tsukiyo no Inbu Kyouki no Chigiri | 乱れ雪月華 ～月夜の淫舞、狂気の契り～

Elder brother Kusakabe Kiichi and younger brother Kusakabe Keiji will play a game to succeed "Kusakabe school way of shinobu". Though Keiji was going to let the elder brother win who is the genius ninja, the desperate fight is pressed by Kiichi like suddenly turning into some other person.

In the fighting that changes from the game to dying, Kiichi to the stomach of Yukina that conceived the child of Keiji, the action that kills the baby is put. Though Keiji where hatred to the elder brother is held by that started piercing him with the sword, partner Kunoichi Mitsuki of Kiichi sprang up ahead of that. Though Mitsuki protects Kiichi by receiving the blade of Keiji, Kiichi to which the system is destroyed by the edge of a cliff and falls as it is to the bottom of a ravine. Mitsuki that loses the partner who loves also, it disappeared in the bottom of a ravine to chase Kiichi as it was.

Two months later, among the stomach of Yukina the baby who thought was killed, the baby has growing up safely. The art which Kiichi made at that time failed. However, í do not think that Kiichi which is a genius ninja fails. Gentle Kiichi cannot do the behavior like such a maniac either.

As for this, some truth may be hidden... Keiji which thinks so, it begins to look for elder brother's real intention as Kusakabe current head.

Then, the woman in the bed of Keiji showed up...