This art was originally done by  chillyphillix

Here's another pic, featuring Hara and Miel, the Tanuki in a bit of a, well, 'sweet spot' (hur hur, yes I know, bad pun :P)

Both characters also appear in the Lunar City universe stories by  lionkinglover12
Miel was originally introduced in the story, 'Honey Troubles' (Part 1: https://www.furaffinity.net/view/29554034/ and Part 2: https://www.furaffinity.net/view/29884954/ ). I'd imagine that, sometime after the events of said stories, Hara eventually approached Miel some point later, giving another apology and admitting that, despite everything, the bear's cooking was still quite good and if not for the whole 'trying to stay himself' thing, he would've happily kept eating.
Miel appreciates the thought and notes that he did have some recopies he always wanted to try, hinting to the tanuki for help.
Though, Miel saw quite a bit of worth in Hara. The tanuki's appetite and taste seemed to be a perfect match for his cooking skills. So, the honey bear decided he should take some responsibility for Hara. Which, in the Academy, sometimes means a whole lot when a professor decides to protect someone they found interesting. Hara didn't actually mind the honey bear's slight protectiveness.

Though, if there's one thing that Hara will never admit out loud to his friends, it's that a honey-belly-bath seemed to do wonders for relaxing in. Hara didn't even expect it the first time. Miel insisted that Hara should relax (sometimes a red flag in the Lunar City) and forced his paw by swallowing the tanuki. Hara objected, until he actually gave in and relaxed, finding the sensation not too bad actually.Since then, Hara did sometimes insist he was fine, whenever Miel decided Hara needed some time to relax and de-stress. Though, eventually, the tanuki eventually did grow somewhat fond to it, the feeling of such a bath doing wonders for his mind and body, with the objections each time becoming less and less, to the point where they stopped happening and the tanuki just happily obliged when offered.

Though, he will never admit it to anyone else. Not even to his friends. It would be totally embarrassing if they found out~ :3