Depend on 'How Similar Do You Want It To Be?'.
- Everything is similar
- The kinks
- The sexual gameplay and their attainability
- The game mechanics
- Game genre
Of course, the above only represent some of the more general concept of a game, it can be broken down to more sub-orders to further distinguish the type of your preferences.
For instance, you can say, that [Lab: Still Alive] and [Lab2 Underground] fits quite nicely, but it only shares a few similarities, but can be wholly different to you altogether (since the criteria you're looking is not there).
You might even have your own kinks and hate, which can make the value of the game different to you than the ones recommending it to you.
Anyway, I listed some of the games that might interest you (though you might have played them, but... Meh, whatever) below:
- Mostly similar
[Hakkaku-ka - Mission Mermaiden], [Hakkaku-ka - Hachina / ハチナ怪異譚]
**I don't think they have Virgin system implemented.
- Sexual teasing and Build-up
RPG - [Torauma - Jumble Joker], [Torauma - Jumble Striker], [Oiran Ichimi - Iris★REAction / アイリス★REアクション], etc.
Platformer - [D-Lis - Night of Revenge], [Nine-Birds House - Princess Defender], etc.
Rogue-like Action - [The Agnietta: The Holy Healer??], [Usagi - Maiden Snow Eve], ([Shimmering Horizon and The Cursed Blacksmith] is somewhat similar to MSEve, but not to what you enquire, just gonna put the title in anyway)
Tower-Defense - [Tomago - Sexual Violation x Tower Defense] **Doesn't exactly fits the criteria, but not exactly wrong either**
- 2D Platformer with well-made In-Battle H, but Without Sexual EXP build-up & Without Horny-Virgin Route.
[KoooNSoft games], [Lab: Still Alive], [Lab2 Underground], [Vita Great Escape], [Eroico], [Noaika], [Chairi Soft - Guilty Hell I & II], [Oiran Ichimirin - Iris Action / Torenia?], etc.
**Quite a lot nowadays, actually.