TL;DR: 3.25 has plenty of issues, but I kind of like something about it and would like to read more of the series.
First, a rant.
Dear publishers, you suck. This series ran to 5 volumes in Japan and as far as I can tell is completed. To date only 3 volumes have been released in english (over 5 years). I can understand that, translation takes time and money and sales are going to dictate what gets worked on. What I absolutely can not understand or forgive is the fact that volumes 1 and 3 are in print and for sale and volume 2 is out of print. Used copies of volume 2 are going for 4 times the cover price. I can buy the entire 5 volume set used from Japan for less than that. WTF! The work is done, call the damn printer and have more printed. Or look into print-on-demand it's quite good quality these days. It's like free money, just waiting for you to open your hand and take it. If for some reason the rights holder doesn't want to allow another printing, drop the whole series and return all rights to them. This kind of stupid BS just hurts everyone. Now if I want to read the rest of it in English, I have to resort to pirate sites, and I absolutely loath reading on the computer. This kind of crap is why legacy publishing deserves to go extinct.
Now, on to the actual story...
To be honest, I'm not really sure what it is about this manga that makes me want to keep reading the series. I'd can't even do a pros and cons list as I can't quite put my finger on the pros
The art is not bad, but not really my favorite style.
The translation is kind of awkward, it's always difficult to know how much of that is down to the translator and how much due to the source material. I get the very distinct sense with this particular book that stuff is being lost both through the source's use of idiomatic language that loses too much in translation, and cultural tendency toward understatement and indirect communication that I lack sufficient knowledge to parse with any confidence.
There's a huge age gap, which I never like. The older guy, Sakurai, who I'm going to say is the MC as we never really get into Youichi's head at all, has only ever dated women and takes forever to recognize his own attraction, so there's a bit of a GFY vibe.
It's pretty much instant dislike, though there are some hints of awkward half-assed overtures, but they're overpowered by the squabling. It's like the grown up version of primary school attraction.
I guess the prickly, awkward aspects of the MCs are what's appealing though, if that's the one thing I can name. I can relate to, and am attracted to some aspects of their personalities.
Also on the plus side, there's no sex, and based on this volume I wouldn't expect any for the next several, if ever. I've read other stuff by this author, but I don't recall if that's typical. It also makes it hard to know what to label this. It's got a big "yaoi manga" on the cover, but my brain still rebels against using that term for this sort of thing as "yaoi" was generally reserved for the super porny pwp stuff when I first learned the term.
!Also, did you notice the name? Sakurai. Blossom, gardening... could the symbolism possibly be more heavy handed? No. The answer is no. :(