My real father (a burly man in his 40s) became a beautiful girl due to TS disease, and it's really difficult...

High school student Yamazaki Kenji discovered one morning that his tough father—a rough construction worker who had single-handedly raised his son—had transformed into the appearance of an adorable female middle school student due to TS disease. His father tries to continue living as he did before, but the gap between his appearance and behavior becomes unbearably difficult for Kenji in various ways. However, gradually Kenji begins to realize his parent's love for him...