Nega Baraneun Geon Irueojiji Ana

Won-Hyuk’s life is simple: study hard, stay out of trouble, and prepare to study abroad. But everything changes when his alpha stepbrother Han-Seo suddenly reappears. Won-Hyuk wants nothing to do with him, but how does he face someone when his body remembers what his heart wants to forget?
(Source: Manta)
Note: Chapter count includes a prologue.