There a total of 6 volumes of this manga and its still ongoing. I wish there's translation group out there picking this up. I'd really love to read this.
English translated, read here:
https://comick.app/comic/kimi-no-kaketeru-tokomo-suki
Read here:
https://www.webtoons.com/en/challenge/novae/list?title_no=106507
For Raziol backstory (or you can call it prequel):
https://www.patreon.com/posts/inhabitant-of-49454539 (although its on patreon, its free)
僕が歩く君の軌跡
Genre: Drama, Slice of Life, Shounen-ai