Responses

No I get it. The author said that he had slept with a few people while he was separated from Heeseo during those seven years. So people thought he slept with his step brother since he’s in love with him. And to clear things up, she said they never slept together. It was just other people. She also said Heeseo remained celibate during those seven years.
Heeseo’s gonna lose it the second he finds out Taekyung slept with that friend.