After some time leaving close to college campus, son receives a visit from his beloved mother. With a past of intense love between them, will they behave this time?

An R-18 continuation of the Kiss x Sis manga series, taking place before and after the final chapter.

When a black transfer student starts hitting on Nao, Hiroki, her childhood friend stands up against him, only to be beaten up to a pulp. He then promises to get stronger and get revenge.