Genre: au!highschool; smut; romance
Warnings: under-aged sex
Summary: Kyuhyun's twin sister, Jihyun, goes a little too far when trying to seduce Kyuhyun's latest love interest, Sungmin.
A/N: there will be TWO versions, not just one. the second one will contain twincest/threesome.
In total, Kyuhyun thought Sungmin was perfect, but so did everyone else…including his twin sister.