Uhmmmm....

It is. Obviously I don't know about the content of the chapters that aren't out yet but I don't think it'll disappoint.
So far, it's been a mix of cute, funny and bittersweet. It has somewhat of a calm, soothing vibe to it.
The age gap is indeed huge but I don't really see an issue with it. Not really questionable at all imo. As for why, well let's just say there hasn't been a lot of development in the romance department so far, although it seriously is very cute and fluffy regardless. And as it advanced more into that area, I think it'll stay as cute and fluffy >w<
As for more concrete info about things up to chapter 18, spoiler ↓
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The MC only recently realized that he's fallen for the ML and the ML only just somewhat moved on from the death of his wife years prior. They've been getting along well as friends. When they first met, ML saved MC from a small dog and saw him crying, so ever since then there hasn't been much of a barrier the MC would have with others. In the must current chapter(s), the ML told the MC about his wife, starts crying and the MC hugs him and on an impulse kisses him on the cheek. And is all "////// OMFG I ACTUALLY SEXUALLY HARRASSED HIM AFTER HE JUST TOLD ME ABOUT THIS VERY IMPORTANT MATTER QAQ" while ML was just appreciating it lmao xD
So it seems pretty wholesome so far. It's kinda hard to put into words but you'll see for yourself. I'd really recommend it :)
Also, most chapters are quite short so it won't take very long to read.

Ohhhhh alright then :DD ill take your word for it