Shinpei returned to the Kobune family while Nezu watched over him in order to defeat Mio's "shadow" that appeared on the first lap. However, the tide that "shouldn't be there" still appears. Like Shinpei, the tide has been looping since the summer festival on the 24th. Surprised by the sudden event, Shinpei tries to sort out the situation, but suddenly he is unexpectedly attacked by Mio's "shadow". Shinpei escaped death with the help of the tide, but instead the tide cuts his arm apart.