Dude not to be mean or anything... but it’s literally at the beginning: Lezhin
https://www.lezhin.com/en/comic/3points_en
You have to make an account, but you can read one episode free (aside from the latest ones) every 12 hours. Even if you read it for free, it helps the creator by giving it a boost in popularity, while buying episodes with coins supports them directly.
Bro, calm down! They already realised the mistake. At least they're taking an effort to buy the actual comic! ╮(￣▽￣)╭
Careful with Lezhin though, I think that if people use this site they should know about their practices (unfair treatment of some authors, blacklisting from events, late payments when paid at all, late fees, slandering, and I heard of tax frauds as well). It does support the author, which is great and way better than here if you can afford it. There were quite a few comics I bought there too; but I think people should know too before they buy from them.
(I'm not saying that reading on mangago is better, okay, don't attack me, I'm not justifying anything or defending myself there, just making a statement).
Sorry, I'm a dumbass ╮(￣▽￣)╭
Where's the official site where I can read the manga??? I feel bad for the author.