Any manga suggestion?

[mm§ROSE§mm™]

hey. well, I'm looking for a manga where the main guy and girl develop a relationship in the beginning of the manga and as the manga goes on they encounter problems about their relationship. Example, the girl thinks the guy is not serious so she thinks she's the only one in love. Something like that. hehe. I've read some so please don't recommend:

Itoshi no Goshojinsama
gyutto shite chuu
hajimete

thanks in advance.

PS. please so smut or any mature stuff. And I'd also appreciate it if its complete---but it's okay if it's not.


Thanks.