Aquarium.

A visual novel starring VTuber Minato Aqua. Player plays the role of Aqua's employer and falls in love with his maid. Set in a world that resembles western Europe. The heroine is a new maid hiding a secret in service of the heir of the noble Francois family, who has lost his memories and has nightmares every night in which an unknown girl who says she hates him. One summer day the protagonist is told by his sisters that he needs to practice leadership for when he’ll have to take over the reins of the family. To do so, he needs to give guidance to his clumsy maid and give her advice from time to time. While the hero is attracted to Aqua, she is unable to fully open up to him about her secret and they’re divided by the insurmountable status wall that they cannot overcome despite their feelings for each other. What is the shadow that looms upon them as they face opposition from everyone around them? The is a pure love story of a summer despite social differences.