@Allexio It was published in a non-H seinen magazine, Champion RED.
Just like
https://mangadex.org/title/9637/saint-seiya-saintia-shou
https://mangadex.org/title/13525/dead-tube
https://mangadex.org/title/26401/jinrouki-winvurga
and your "argument" falls apart when manga with even heavier sex-focused stuff like these ones below aren't categorized as hentai (because they aren't)
https://mangadex.org/title/15417/himekishi-ga-classmate
https://mangadex.org/title/21040/parallel-paradise
https://mangadex.org/title/18788/world-s-end-harem
https://mangadex.org/title/24076/tama-kick
This is clear with no room for debate
and you've only read chapter 1, you know nothing about the full content of this manga
Please stop being ignorant with your shitty arbitrary requirements.
You clearly know nothing about everything.
kindly fuck off.
Hope mods can just lock manga information from being freely edited randomly to prevent stupid fools like you to tinker with it.