Hakase is a former scientist in human world. He create a portal machine that can open portal to different universe. During testing phase, the machine exploded and Haka was sent to different universe. He was fainted in the universe. A black figure with white cat hoodie found him laying on the ground and take him (Hakase) to his place to recover. When Hakase awake, he so confused and asked about the dimension he currently in. The black figure with cat hoodie tell him everything about the universe. Hakase broken heart when know he can't go back to his universe. The figure and his wife agree and ask Hakase to be their adopted son. Hakase start to feels a little bit better and starting to adapt with the universe. He also applying all his science knowledge and yet again trying to make another portal with the current world materials. And one day, he successfully create another portal and it's working! So he can finally go to any universe with his new family for adventure.

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Years past since Hakase got his portal worked. He live happily with the Tadano family. But, one day he got pranked so bad that he ended up got kicked out of the house. He ask AiRa to return his stuff that she borrow back then. AiRa say that she kept it somewhere in her room. So Hakase go to AiRa's room and search for his belongings. Since AiRa love to prank Hakase, AiRa told the family that Hakase is stealing 'something' from her room the family caught Hakase and ended up kick him out of the house. So because of that he ended up become homeless and sometime staying at the local tavern to seek shelter.