Gangbiseowa Doryeon-nim

Yoon Hee-Soo, is an illegitimate son of Dayoon Group, a leading conglomerate in Korea.

"From now on, I'll be in charge of your moral education."
"..."
"Nobody cares."

Hee-Soo struggles to escape Kang Joo-Chan, the secretary who controls him and monitors his every move. For the past 10 years, they have tamed each other and been together that way.

(Source: Lezhin, translated)

Note: Chapter count includes a prologue.