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The most incompetent person in the world, Kai Heinemann received this gift at the age of 13. The effects of the gift led to a significant reduction in his physical abilities. As a result, he was despised and bullied in the gifted supremacy of Lamour.
Forced to leave his home, Kai faced attacks on his way to the royal capital. Desperately fleeing, he stumbled into a dungeon. Inside, he had to clear the Trial of the Gods to escape, where time stood still.
Feeling as though he was going to die, Kai spent 100,000 years clearing the dungeon. During this time, he became the most powerful being in the world, gaining unique and strong allies along the way.
An exhilarating muso fantasy begins with a boy once called incompetent!


These "adults" haven't even kissed, gone on a proper romantic date or anything worthwhile since they started dating. Hell, she even got introduced to his family already before they held hands and gone on a freaking date and now Kota is getting introduced to her family. This is probably the one issue I have with these types of romance manga; if your characters are older then at least properly portray them as such. Usually they give the characters a weird personality quirk that prevents them from progressing things (like one being super socially awkward on bocchi level) but the two of them weren't given that and suppose to be regular working adults ... late-bloomer or not.