When Ryuuji is left to raise his son Shouji as a single father, Hanao steps up to help him out. At first, their family life is happy and content, but Hanao's true feelings for Ryuuji become more and more difficult for him to ignore.
https://www.chapters.indigo.ca/en-ca/books/dont-call-me-daddy/9781427867308-item.html
In a long distance sorta-relationship with his crush, Shouji is crestfallen when weeks of ghosting turns into a confession; his boyfriend just isn't gay. Having struggled with his sexuality for years, Shouji throws himself into his work to distract himself from the rejection, but when a young homeless man called Hama shows up at the shop, Shouji finds himself curious to learn more about him and, hopefully, befriend him.
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I'll be changing this list to feature mature stories, while the Fluffy list to contain school life stories as I have a hard time distinguishing where to put where haha.