the story's not over....so many (hopefully) we'll have to more of their past. hirono's role in this was weird because we dont if this is a love triangle or some out-of-place insert.
Its too late to develop their relationship now that AFTER the climax has passed. It's like starting to read a book after you've been spoiled on all the plot twists. Its bad writing. And according to Kyozana from the comments, ch4-6 is about another story?
Apparently yeah....new characters.
This leaves so much to be desired, because the story setup had so much potential and it feels like the author just threw all that away.
I didn't feel anything reading this manga. Does it mean I'm dead inside? Lol. I just didn't think the author flesh out the characters well enough. Like, there wasn't sufficient buildup leading to the climax. Did hirono+yuuma love each other? I couldn't really tell,except it was kind of implied in the letter. If the author took more time writing about their relationship, it would have made more of an emotional impact when the other dude got pregnant and hirono left. This story feels too rushed with only 3 chapters.