Apparently the original Korean one is Yaoi, but when it was translated to Chinese, it was censored and so the result is a shounen ai. I think (I've read it in the comments) that the raws used for this one is the Chinese, hence this might be shounen ai :(
ohhh damn
NOOOOOOOO ╥﹏╥
btw i checked the korean raws but i think they just used the chinese raws and translated it into korean since the korean raws are censored as well ㅠㅠ
huhu...Please author/creator make it clear, is a shounen or Yaoi...Please make An adult plot cause the uke and seme are fit in the role...They're both in ripe age tot he those stuffs