He doesn't draw hentai so I don't really know why it's such a big deal that he has to hide his career, but it'd also be hard to make the show as pure and wholesome as it is if it were hentai.
Though this piece opens up a chasm in my heart of my lost love and the child I never had, it's a poison I took with joy. Beyond a selfish romantic needing love, this is that of a father's boundless love for his daughter, Hime. There is no forced drama, only an intense overwhelming sweetness of what can only be considered the most wholesome content to exist in media, laced with a somber tone of a missing mother, and a vague future.
Though the show very clearly reaches into your heart to pull on its strings as it hints toward the end, by the time you arrive at the finish line you'll openly weep and be happier for it.
I wish only that this show were longer, I can't think of any other show similar to this in being only pure wholesome content, almost completely devoid of drama. Something to make me forget the general heartache that is, living.