xiumin is an omega, and obviously luhan is his alpha. but the problem is xiumin have one possessive alpha father (i prefer uknow) and two possessive alpha big brother (sehun and kai, but it's up to the author).

they found eachother and they want to mate, but since the first time and knotting will be painfull, xiumin's father and brother's wont let luhan (poor poor luhan will be frustrate T.T).

so we have one shy and sorry xiumin and one frustrate and horrified luhan.they are searching for some way to mate  without xiumin's familly find out. xiumin is also scared so he is not much help (but of course luhan is better not to khow his secret).

yeah, that's it.i think it's going to be comedy ^^ and the length is up to you :)

look what this lovely outhor (TheDiamondMaiden) did with this prompt. love u and thank you ^.^