The "Himawari So" ("Sunflower House") is a group home for mentally underdeveloped adults. Manga artist Itpon Aijo begins to work at the "Himawari So". He moves into the home with his daughter Mako, who is mentally underdeveloped. Uyan is a resident at the group home. Uyan and Mako begin to develop feelings for each, but Itpon becomes worried about them. ~~ Based on a stage play performed by the Troupe Tokyo Sereson Derakkusu. The play was performed in 4 cities in 2010. Takayuki Takuma wrote the play, based on a newspaper article 10 years earlier.