姉恋模様

Older sister, Megumi who is kindhearted and cheerful... and younger brother, Masato who is shy and generous.... They have been getting along with each other. However, one event changes their relationships.... Masato starts to see Megumi as a woman... and Megumi starts to love Masato.... They are afraid of crossing over the line someday.... and one day, a woman appears in front of them....