It was nice to see a versatile seme, Miyama. I liked how even though he accepted Nishina into his life again, he's aware of the fact that he can't fully trust him again because he was already abandoned in the past. They were opposites in high school. While Nishina was cautious about how others saw their relationship, Miyama didn't care as much, and only wanted to openly express his feelings for Nishina. They were mutually in love, but because Nishina was instilled with the principles of the "normal way of life," from the start, he decided that their love was only temporary since they couldn't get married or have kids, and they'll definitely be shunned by the society. In Nishina's POV, Miyama was too reckless, not thinking of the consequences ahead and only focusing on the present, thus, being inconsiderate of him. In Miyama's POV, it could be that Nishina was too mindful of others and how they'll be perceived, that he becomes inconsiderate of Miyama's feelings.
I feel like the story is deeper than how others may see it from the first time it's read. It's quite short, but the author was able to deliver complex feelings and emotions.
Hatsukoi No Atosaki