Help me remember bl ╥﹏╥

So it’s a story about a middle aged salary man and a college student. The college student loved the salary man because he used to accompany him when he is lonely as a kid. And then the college student suddenly come to the salary man apartment and live together with him (Bcs of family problem). And the interesting part is that the college student is very calm, like when the salaryman ditched his promise to watch the firework together, the college student just easily brush it off saying work is more important. I’m sorry it’s kinda fuzzy but I really like the manga T T. If it’s help I think the title has “perfect” in it. Thanks!