My sister's boyfriend is a walking red flag
  • Reads 33,830
  • Votes 744
  • Parts 11
  • Time 2h 1m
  • Reads 33,830
  • Votes 744
  • Parts 11
  • Time 2h 1m
Ongoing, First published Jul 31, 2023
Kim Jeong Hoon is a college student. He's studying Business Management. He meets the narcissistic Do Min Joon who left a bad first impression to Jeong Hoon. One day, Jeong Hoon's older sister, Kim A Reum says she will be bringing her boyfriend over to her house. Do Min Joon then enters the house with a smirk on his face. 

"Oh, so we meet here."
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34 parts Complete Mature

When MinHo's parents leave for a trip, his sister, Mina, who's been kept from public knowledge, comes to stay at the dorm with him for awhile. His sister is his everything and he's very protective of her. When MinHo steps over the boundaries, he pushes her into the arms of someone else. That someone else is one of the people closest to him. Will the weight of their secret relationship make them crack? Will MinHo find out? What will he do if he does?