Haruka Ayase

In the near future, a couple take a state-of-the-art humanoid into their home as their son.

A woman writes a letter to a young man, leading to a correspondence with his father that unveils the truth of a 24-year-old high school romance, his son's death, and the power of love letters.

After the death of their estranged father, 3 adult sisters invite their teenaged half-sister to live with them.

A lonely university student develops a romance with a beautiful interesting woman, who turns out to be a cyborg from the future.