During their martial arts training expedition in China, Ranma Saotome and his father Genma suffered an accident, which in turn, afflicted them with a curse—whenever they are doused with cold water, Ranma transforms into a girl, while his father turns into a panda! Only hot water can reverse these changes, but any further contact with cold water opens the can of worms once more. Unfortunately, the trouble does not end there, as Ranma finds out about his betrothal to one of the daughters of Soun Tendou, his father's closest friend. During the families' first meeting, it is decided that Ranma is to be married to Akane, the youngest daughter, a decision that is met with vehement protests from both sides. The two are simply not compatible, yet they are forced to live under one roof. Ranma's status quo further adds to the chaos, leading him to a series of comedic situations and misunderstandings that, in the grand scheme of things, may just be what he needs to work with Akane.

An adventure in another world with cute girls by your side and video game-like powers—sounds like an anime fan's dream, right? Not so for melancholic author Osamu Dazai, who would quite literally prefer to drop dead. Video games haven't even been invented yet when he gets yanked into another world in 1948. Really, all the fantastical adventure he keeps running into is just getting in the way of his poetic dream of finding the perfect place to die. But no matter how much he risks his hide, everything seems to keep turning out okay. Follow a miserable hero like no other in this cheerfully bleak isekai comedy!

The moon and the earth are linked by a single contact point, "Mitsuru ga Sakichau Ouren Rakuniushi" where Tatsuya lives under the supervision of the Sphere Kingdom (Moon Kingdom)'s Princess Feena Fam Earthlight who is coming to stay at his home.

Based on the manga by Takahashi Haruo.