There should be about 56 chapters in total, but as of writing this, there are 55 chapters translated, and wow. This manga is mediocre at best.
This manga originally had a somewhat original premise: young high school girl doesn't fall for the sweet words of a man 10 years her senior, turns out the man is kind of a perv/masochist and the manga follows his pursuit for her love. Similar to Takane and Hana which, imo, much better manga on all accounts.
Totally agree on the pacing issue brought up by @5chickens wow, it really doesn't feel like very much happens in this manga at all. The chapters can be short and often just, uneventful? It doesn't help that the manga doesn't do anything original in the slightest. Like, wow, omigosh, who would've expected that each of the protags would be involved in a love triangle with a suitor who is much better suited for them? What? The main characters are arbitrarily attracted to each other because the plot dictates it? Alright then.
Another big thing, major spoilers:
As of CHAPTER 55, they are still not officially together yet!! W H A T. There's only 1 chapter after this? Does the story really end with them dating???
This is considered a josei, but wow, it really doesn't feel that way at all. There's no depth to this story. You have a very taboo topic, large age gap, and everyone just totally ignores it in the story. Glosses over that like a laminator. The story can't seem to decide whether to focus on comedy or romance more. Just when you think it's trying to be more comical, they insert weird drama that doesn't make sense, so you end up thinking, wait, are they trying to make the plot more romance focused? Is that why they have absolutely no development in their relationship at all? Bad on both accounts! Unless you've never read a good romance manga in your life, I'd skip this one. Not worth the time.