Reading the comments on steam doesn't help since most of them are just jokes about boobs or how they need tissue paper.
Note: That doesnt mean the translation is specifically on the vita, sometimes theres japanese only vita releases and english language ports for example.
The series, nicknamed amongst its fans with the contraction Toki Memo, consists of 8 main games, in addition to a large number of spin-offs.
The first four main games are the standard Dating Sim games (referred in this article and the Character Sheet as the "Standard Branch").
Mary Skelter actually has significant enough visual novel elements that it's on the visual novel database. It's still a visual novel heavily-centered on romance, even if there are gruesome moments awaiting the male character, or adult themes of drinking, and sex.
OP was also asking for dating sims, so Persona 4 Golden definitely fits that description as a social/life sim slash JRPG hybrid. I got it on Plus (For PS3, but theirs a vita version) but I haven't played more then the first chapter. Most VNs on the Vita with Male Protagonist dating ladies are usually secondary to the main story, Steins Gate, Chaos Child, Persona 3/4, Tails of Cold Steel. The same goes for downvoting everything in someone's history. You took what I said out of context, and misinterpreted what I was actually replying about. It's also a high school drama of a love story!
That game was a low-profile title which became a hit, thanks to massive favourable word of mouth, and the game appealing not only to the intended young male demography but also the female one, thanks to the game's romantic and funny atmosphere.