Semantic Error Manhwa Volume 2 features story by J. Soori and art by Angy.

Jaeyoung Jang has…changed. The previously abrasive pain-in-Sangwoo's neck now smiles kindly, pulls his weight with the group skit, and is a generally pleasant person to be around. And strangest of all, he keeps giving Sangwoo affectionate little touches here and there! Sure, this newly patched version of Jaeyoung may be much nicer and friendlier, but how is Sangwoo supposed to deal with him when he seems to be causing strange malfunctions to Sangwoo himself?