Maybe I'm spoiled for choice, but I found Harukoi Otome to be frustratingly mediocre when it wasn't being infuriatingly awful. I'm going to be frank, I don't think I played the same game as everyone else here.
Buy this if you are looking for a vn with a good story and romance. This vn will give you a mix range of emotions but it is well worth it. In the end she stops doing all of that, stops being a tsundere avoiding her true feelings, and confesses her true feelings and love for the protag. It did take her time to realize that she loves him and when she does find out her true feelings she is in denial, refusing to believe her true feelings, tries to falsify it, and chooses to ignore it for some time. Her ending was good too as well as the other heroines as well but not all may please you but in my case Riru's route is the best and just unbelievably romantic and awesome especially since she had no interest in males until she got to know the protag. I wanted her to get a continuation to her route the most because they were going to get married after they finish school and become independent but sadly the epilogue did not have them get married but only because they were still in school. The dialogue with her is great as well as her H scenes. Riru for example, her route is to me really romantic when she gets in a relationship with the protag. After completing the game I found myself sad there was not a fandisk because some of the routes needed a continuation because of how awesome they are. The drama in her route was not forced, it was instead natural.
The romance, drama, character development, and sex scenes are all good.