When Fuku returns home for the holidays, his sister-in-law Kasumi, a former honor student who works for a large company, has become a shut-in since she became mentally ill from overwork.Her family recommends therapy, but Fuku feels forced and broken.One day, she suddenly says, ``I'm sorry for being such a sister-in-law who can't do anything.''Fuku sees Kasumi's empty expression and becomes worried, saying, ``If I leave her alone, she'll die.''At that moment, Fuku desperately tries to find a way to give his sister-in-law a reason to live.``There's not much I can do for Fuku, but if there's anything I can do, please tell me...'' and Fuku says, ``I want to see her breasts.''Kasumi, who has low self-esteem, says, ``My nakedness is worthless...'' but Fuku denies it and sucks on her breasts...
