In every episode, the five teenage protagonists relax together nude in a bath house. They sometimes hug, push, or make other physical contact while naked. Often only the chest, shoulders, and upper stomachs are seen. Sometimes other characters join them, presumably naked; sometimes those characters are portrayed as adults. No frontal nudity.
(Deleted. Personal opinions about content are not appropriate for the Parents Guide.)
During the teenage protagonists' transformation sequences in each episode, rear nudity is depicted, sometimes with lingering shots. For some of the characters, they are fully nude from the front with a hand or magic wand covering the groin.
In a particular arc, there are twin teenage boys who bathe together (usually only shoulders, chests, and upper torsos are seen), hold hands with each other, and have an erotically close relationship (although no sexual activity is ever made explicit).
At certain moments, the teenage protagonists revert back to toddlers, fully naked with a leaf covering the groin area. Nude backsides are shown. Can be uncomfortable for some viewers.
Many sexual words are said e.g love-making, love shower, etc.
In a flashback, a character says that he will wash another characters back in the bath.
In one episode, a house is built in front of the Kurotama Bath and the characters say it looks like a love hotel, but one character doesn't know what that is, so he keeps repeating it.