[ Animated Movie ] Gakuen Shimai 1

Kino Hitoshi's original artwork served as the basis for this adaptation. Arisa and Mika Nanase are twin sisters who are regarded as the school's super-idols. They are the most attractive and attractive females in the school. Unlike the other males, Sousuke is a regular student who can only see the super-idol sisters from a distance, much like the rest of the lads. Sousuke has a soft spot for Arisa, but he will never be able to converse with her. Mika informs him that she want to chat with him after school one day. Mika and Arisa later meet with him, and they disclose that they have now become siblings! Rather than meeting at an archaeological site in South America while digging a ruin, the fact is that Sousuke's father, an adventurer, and his sister's mother, an archeologist, met at a ruin in South America while excavating a ruin and fell in love. They later married. Mika, Arisa, and Sousuke are now considered siblings, and they will all be living together under the same roof from now on. In order to avoid being discovered masturbating by Mika or Arisa, Sousuke must be extra cautious... or else they could just lend him a helping hand... Take a bath with Mika and relax. After all, siblings do take a bath together...