This is a visual novel about a bunch of teenagers who are not really musically inclined starting a punk band in Japan. They also definitely are not punk in terms of attitude either; they're a group of pretty average, rule-following kids who do this on kind of a whim. For most of the game, like 90% of it, it's just a fun story about these teens learning what touring in a band is like, and starting to embrace punk ideas more and more.
Then some shit happens, and the game takes your heart off a fucking cliff. I don't want to spoil what happens, but it's unexpected and miserable and it hit me really hard. There are some specific aspects of this last portion of the game that just mirror some things from my own life and my own feelings in a way that was kind of unsettling... but also a little bit comforting, because it was written proof that someone out there understands some of the more miserable thoughts swirling around in my head. It then ends on a high note of sorts, though it's bittersweet at best. It ends with an acceptance of the miserable stuff, not a triumph over it, though that moment of acceptance feels triumphant, in a way.
I never played the other endings; I know that two of them don't have anything nearly as shocking as the ending I played, and that the last ending has you on the same path as the one I got, but making choices to prevent the rough shit from happening. The idea of that just rings kind of hollow to me. The ending I got was meaningful to me, and while subverting it might be cathartic, it would also undermine the very real emotional experience I had my first time through.
Oh, um, this is a visual novel that has the uncomfortable sexual content. The game asserts that the characters are 18, so... it's technically not that weird? But the plot is not really conducive to that actually being the case, so it's more like a sticker slapped on the front of it to cover their bases... So yeah, it's weird and uncomfortable and unnecessary, like it is in most visual novels that have this stuff in it. It's frustrating because it's just, like, something baked into the genre on some level. Not all visual novels have it, obviously, but a lot do, including some really genius ones with cool conspiracy plots that aren't really focused on romance. In Japan, not having this kind of content means you sell less copies, too, so it's often forced into games that have no good reason for it to be there. This game does have a romantic theme to it, but it definitely tells a story that is not served by this kind of content.
If you can look past that kind of thing, I recommend this game, but if that's a dealbreaker, and it's totally reasonable if it is, then stay far away. There may be a version of this game that has that stuff removed, but I don't know whether or not it exists in a localized form.