Dont say that he has to stay with jin
He does in fact end up with Mitsuru though.
Heres the ending:
http://www.fumanhua.com/manhua/1620/247432.html
wow. that sucks. never liked mitsuru from the start, because he's such a manipulative, cruel person. they all irritated me. i would say the least irritating was jin, but even HE had character inconsistencies. the writing was just all over the place. :/ frustrating.
Nozomi is a slut he end up with Mitsuru.