[Reducing Mosaic]WANZ-036 Dear big brother, Mikaka Nakagawa.

Reunion with my sister «Mika». Since I came to Tokyo, my sister Mika has come to visit me, who hasn't returned to my parents' house for a long time. How long have we not seen each other since then? Mika, who I haven't seen in a long time, doesn't seem to have changed at all, and she seems to have changed completely. When I sensed the subtle change from a girl to an adult in her facial expressions and gestures, something burst inside me...