Ritsuka, who likes to watch the snow as it falls, has an unrequited love for Fubuki, who lives with an older woman. Ritsuka and Fubuki fall in love, but Fubuki still has past debts toward the older woman, who was his dead brother's fiancee.

From Shoujo Crusade:
Otomi's piano teacher is a handsome, sexy, and amazing pianist. She is crazily in love with him, but he is happily married to a wife whom he loves a lot. Things aren't always as they seem though.