Manager Kim

Single father, company manager, and former black-ops member, Mr. Kim lived an ordinary life until his daughter, Min Ji, went missing. After discovering his daughter could be dead, Mr. Kim turns merciless and sets out for information. He will rescue his daughter by any means necessary, even if it means destroying everything and everyone standing in his path.
(Source: Webtoons.com)
~~ Adapted from the webtoon "Manager Kim" (김부장), written by Toy (토이) and illustrated by Jung Jong Taek (정종택).