Hitsuji had a crush of his high school friend, Hatoyama, but never acted on it. Years later, he finds out that Hatoyama's son is in his class and having a hard time fitting in with his classmates. He decides to do a home visit in order to discuss it with his father and he learns that Hatoyama is a single father who only recently started caring for his son and is having a hard time getring used to everything he has to do. Hitshuji offers to temporarily help out around the house but in the process starts falling in love with Hatoyama all over again.
As sweet as this story could have been, I just found it incredibly boring. There was never any indication that Hatoyama thought of Hitsuji as anything more than a friend, then out of the blue, he tells him that he loves him. There wasn't any buildup to that moment, so not only did it seem out of place, but there was no emotional impact whatsoever. My only response was frustrated confusion and annoyance that I actually spent money on this mess. 2 stars
*****
If you want to read a much better version of this type of story, I recommend Papa Datte, Shiti by Celina Seo. The romantic relationship between Naruse and his housekeeper/babysitter, a fourth year college student named Asumi, builds up more naturally, it's hella steamy, there's lots of drama, and you really become emotionally invested in what's going on in their relationship. You can find it online free. You won't be disappointed.