Odd Relations: Blood of a Kind

Do-Hyeon has spent years haunted by a lust-ridden crush on his stepbrother, Yu-Won. Yearning after what he can’t have, Do-Hyeon is growing increasingly desperate and daring with expressing his desires in private. Little does he know that Yu-Won is not only aware of these carnal desires, but also reciprocates them. The truth eventually comes to light after the arrangement of Yu-Won’s blind date with someone else… and Do-Hyeon discovers that while the two of them may not share the same blood, they both share the same obsession towards each other.

(Source: Tappytoon)

Note: Includes one extra chapter.