I kinda did it on a whim, after I found that some people weren’t even aware Boichi (the mangaka behind Dr Stone, Hotel, Sun Ken Rock, Terra For Mars Asimov, and maaaany more works yet) had had a successful hentai career.
I went and fixed the links in my four Boichi hentai shares, you can now either read them again, or go ahead and discover them, I promise you, they’re totally worth it 
Not just for the hentai part. Well, that too, of course. Graphically, if you’ve read Dr Stone, you can’t tell me there weren’t moments you didn’t feel the mangaka had a temptation to go further, and the means to do so.
But also for the story. There’s such an amazing sense of comedy, of vanilla, of preparing surprises and taking the reader unawares… That was golden, I’ll insist, check it out if you don’t know it yet ^_^
My Boichi shares are:
– Lovers in Winters (224 pictures, tons of comedy and hardcore sex)
– Space Chef Caisar (246 pictures, not really hentai, ecchi at best, a comedy manga about a brazen space cook),
– Personal Lesson Full Of Love (a one-chapter long vanilla story), and
– No means No (one chapter long, may or may not be about chikan)