Even though the game is numbered 1.00, it's far from being done. At least, assuming the goal of the game is to have sex with each love interest at least once, and given the game's pace. In that regard, there's really not much progress. There also could be scenes where stuff is missing, or there's the infamous "Lucy in the shower" scene that's been a cliffhanger for years and that Rainces probably will never resolve despite saying "maybe in a later update". Rainces has a tendency to develop plot lines, bring them close to the MC having sex with one of the main interests and then... things get undone somehow. Either progress gets ignored, or something silly happens to get the love interest mad at you or to otherwise put them in control over you even if that makes no sense.
There's one actual vaginal sex scene with between the MC and one of the four main love interests, and that results in a game over. Other than that, it's mostly sleep creeping and dry humping. If and when there is a next update, there may be some actual sex with them. But I wouldn't be surprised if at best we got sex with a side character.