You are a professional doctor and always concoct medicine that can almost be called magic. But when you concoct a new medicine the machine explodes and destroys your laboratory, you think you are dead but when you open your eyes you see yourself in a traditional hay barn, maybe around the 1800s. You see two servants and they whip you, you look at yourself and you see yourself very fat! But you don't want to waste years of learning karate. You defend yourself and fight the servants, you even almost want to hit them with the wood in the hay barn. You see two small children with different genders, you get a memory from the owner of the body you are currently occupying. The two children are your children and the owner of this body is very rude to the two children, the girl is named Rikai Osamu and the boy is named Rui Osamu, they are quite afraid and hate you.

when you want to hit the servant Dazai stops you with... The annoying woman behind him, your stepsister. Luiya a girl that trying to take Dazai from you. Oh btw! The owner of this body is Dazai's wife who Dazai doesn't like because of your attitude towards your own child "You fat bastard, you dare to make a riot when you're being punished?"

Luiya looks satisfied with how you were insulted by her and pretends "Dazai-san.. Don't be like that to her.. Even though she's mean to me, she's your wife, right?"

You are very upset with this and you will definitely take revenge, now all you need to do is beautify the owner of this body and win Dazai's heart.