From Psycho Pandas (back cover translation):

It’s not male bonding, it’s “animal ♂” bonding. Once the spider, Shiori, met the beautiful and gentle butterfly, Midori, he fell in love. However, Midori is “feed” to Shiori. A love that cannot possibly have a prayer… The other bugs in the story include a cicada that was born merely a week ago and his unrequited love, a camouflage bug that crosses their path… And what about the bugs who shoulder many difficulties and their earnest pure love!? There’s also random bug knowledge.? The popular work drawn especially for serialization.★

"Your opponent: a BABY + Current state: a lot of PANIC = Result: a JOYOUS occasion!"

Konno Wataru, a rich son who is studious and quite prideful has a "butler." In charge of him is the domineering sadist Azuma, holding an official caretaker license and to top it all off, he's perverted. Amidst their instinctive cat & dog relationship, things get a bit risqué, during which Wataru's older sister's baby, Momoka, suddenly appears! With a MIA father, Momoka's care is left in their hands! In between the teasing, puzzled Wataru unexpectedly witnesses Azuma's sincerity…however…?!

A spin-off presented from the super popular "Dekichatta Danshi" featuring Yujiro & Hisui?

(Source: Starry Sky Scans)