I started the game but I don't see any main love interest. can someone who finish the game tell me Y or N
At the moment, no, there isn't an established love interest. But the game is still early in development and there's still 3 more characters who will be added to the game in future updates. Ash probably comes the closest to a possible love interest for the hero if you get both H-scenes with Ash, though the H-scene with Lyric also indicates that Lyric is interested in the hero.
The first scene is in the hero's room after returning from the 1st mission (don't talk to Lukka or let him walk you home to get this scene), and the second is in the fairy realm when you have the option of hanging out with Ash or Lyric. If you've already had sex with Ash, the dialogue and the animation in the second scene will change. I can't really say for sure that the changed dialogue hints at a possible romance between them, but the scene seems like it could be setting the groundwork for a future romance.
It's a bit iffy though, cause the dialogue essentially boils down to "we've had sex before, what if it happens again, do I want it to happen again, wow it's happening again, that was great, can we be fuck buddies, eh maybe". It was pretty funny though, worth a play-through to see it.