Surprising Turn (Kimetsu no Yaiba FanFic)

Zeniko Agatsuma just a wannabe playgirl but none of the boys had taken her seriously. Eventually searching for the man who saved her during from almost getting raped by group of delinquents during her middle school.

One day, there's a good-looking guy who seems to be working as waiter at a cafe that seems new in the town that tries to liven up her mood after he serves her orders it was such a timing that she was in a bad mood. She wants to know about the said person to at least she can pay some gratitude on two people. But with such unexpected turns.

Who would've thought that a former delinquent boss and their art teacher Uzui Tengen will have an interest on an average girl despite having 3 wives already who also owns the new cafe in town? But as these two get closer they start to realize the ups and downs of having a relationship.

Sumiko's summary since it cannot fit on the Summary part.

Sumiko Kamado a very honest student that can be a good example to anyone, even to her siblings except she often gets chased by his adviser for wearing such long earrings which is not allowed at school. Even if she explained it a lot of times that it's a family memento.
One day student's favorite teacher Kyojuro Rengoku asked her a favor to tutor his younger brother because of her knowledge on a specific subject that might help his little brother to improve his grades. Unexpectedly being a tutor might end up going into such mess up misunderstandings to a smooth sailing relationship.