This was lovely. A oneshot with room for tons of angst that turned out to just be a beautiful story about friendship and love.
The usual arc of stories like this is:
* best friends in high school, with a Big Event that pulls them apart
* one disappears right after graduation, changing his number for maximum separation
* they run into each other years later and mourn all the missing time because it turns out they were in love all along
Here, we have ten years pass after high school and the Big Event - Minagi feeling responsible for Aki's career-ending injury - but they never actually pull apart. At least not physically.
It's a little difficult at the beginning to tell what their relationship has been over that time, since they seem pretty chilly with each other when Minagi's getting his hair cut at Aki's grandfather's salon. But I think they were still interacting over the course of those years - just not as intensely as when they were younger. Which is realistic; I live in the same city as my college best friend, and it takes effort to actually make the time to hang out.
They have a third friend, Sarara, who seems to have stayed close with both of them, kind of bridging the gap with feelings that are a lot more stable because they're a lot less complicated. After the death of Aki's grandfather - which leaves him running his hair salon alone - Sarara drags Minagi to Aki's door and claims Minagi needs to live with him for a while, because of some handwavey excuse about trouble with housing.
Honestly, this made very little sense, and probably did to Aki as well. There was some excuse about a "dorm" not allowing him to rent there - but I think they're all well out of college by this point? - and about Minagi having trouble finding another place to live, even though he makes a ton of money from his host job.
I'm okay not looking into it too closely, which...is probably true of Aki as well. Because there isn't really any bad blood between them. Just some lingering frustration about the abandoned dreams from their youth.
In their third year of high school, the three of them were incredibly close, and all had big ambitions for their future. Minagi was brilliant (although not possessed with a ton of common sense) and planned to follow his parents into the medical field, spending time studying abroad as well. Aki had a university sports scholarship, for soccer, and had hopes of going pro. Sarara hadn't really figured out his future yet, but he and Minagi had been scouted by a modeling agency on their school trip, so that was a possible path.
But Aki's dream got crushed, which led to everything else derailing.
It makes sense, actually, that they spent a decade not talking about the formative moment, because Aki never had any reason to blame Minagi for what happened. They'd simply been on a staircase at school, and some jealous guys had been talking smack about Minagi and then roughly bumped into him to show their anger. (He was incredibly intelligent and handsome and good at everything and from a wealthy family, so a lot of people hated him and thought he got whatever he wanted without having to even try.)
Minagi lost his footing and started falling down the stairs, at which point his memory is that he grabbed for Aki's arm. In the flashback panels, this doesn't seem to be the case - his hand is limp, while Aki is lunging forward and grabbing at his forearm. Regardless, because Minagi fell and Aki tried to save him, Aki wound up with an injury that left him unable to play soccer - at least for the rest of their school season, and with his sports scholarship going up in smoke.
When Minagi and Sarara visit him in the hospital, Aki puts on a brave face, as he always does, saying it's not a big deal, and he'll just do a trade school and work for his grandfather. But when Minagi goes back a few minutes later, wanting to apologize, he sees Aki with his hands over his face, crying.
Because Aki is an incredibly kind, selfless person who would never blame anyone else but who was also devastated by seeing his dreams fall to pieces.
Minagi, in his brilliant but weirdly-brained way, decides that means he can't follow his dreams either. If it was his fault that Aki can't play soccer, then he won't become a doctor. What's fair is fair.
He does still go to medical school - his parents insist on that - but after he finishes his degree and gets his license, he starts working for a host club instead. Aki can't understand it, but no matter how often he brings it up, Minagi just shrugs and says it's fun. Plus he does make a lot of money. And anyway, he points out to Aki's annoyance, Aki isn't playing soccer either, so things change.
It takes Aki a while of living with Minagi to finally put the pieces together and understand that Minagi very specifically gave up on his dream because of him losing his own dream. And that devastates him...not because of soccer, but because it means Minagi has just been doing everything out of guilt this whole time. Staying friends with him. Moving in with him. Giving him way too much money for rent. Even sleeping with him...
...because four years prior, Minagi had still been a virgin, going to work for a host club, and Aki had offered to be his first, since Minagi wanted some experience to be able to talk to his clients. A stupid idea: Aki had been in love with him for years, while Minagi just viewed it as another interesting life experience to learn from, since that's how he interacts with the world.
And Aki, naturally, feels horrified and hurt and betrayed when he realizes that Minagi has been sleeping with him all the time after moving in with him because he feels bad for him. So he stops everything and basically kicks Minagi out - it's not like he's actually destitute or in danger of not finding housing on his own.
But when we finally get Minagi's point of view, a lot of the pieces shift into their proper place. It's true that he took the host job solely to stay close to Aki and take responsibility for his injury. As a popular host - the face of the club after four years - he has the pull to send a ton of clients Aki's way, which boosts his business and transforms it into a place where Aki can really make a good future for himself. (Sarara, who became an actor instead of a model, also sends his celebrity friends to the salon, so both friends are taking care of Aki.)
More importantly, though, Aki is just way more important to Minagi than anything else in his life. It takes a while for Aki to understand what that means and to be okay with it, and with the idea that dreams changing doesn't mean the person has lost anything. Minagi truly takes enjoyment out of what he does - he spends most of his time as a host simply chatting with people and learning things and pestering them about their health and medical checkups.
I think that he does go into actual medical research once he and Aki sort things out? There's talk of him going abroad for conferences etc finally, although he still seems to have ties to the host club? But the point is that they talk about things, realize that things change a ton as you grow up, and it's important to prioritize what you value most, while finding ways to support each other so you don't have to give up on anything you do still want.
It's a complicated, very grown up story, with an intense loyal love at the heart of it. I also appreciated Sarara, who is very straight but loves his friends very much. It's a story with a lot of heartache but deep kindness grounding all their actions.