On the August 7 episode of 'Oppa Thoughts', Sungjae revealed, "(On-screen) Love lines never actually worked out for me.'' When asked if there's any particular romance he dreams of acting, Sungjae responded, "I want them to fight over me."�

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MC Tak Jae Hoon asked, "Has that ever really happened in real life?" and Sungjae answered, "Yeah, a lot. When I was in elementary school, there was a group of girls and all 5 of them liked me. They got into a fight and one ended up moving to Canada."

As for his dating style, Sungjae revealed that he's the type to give all. He talked about the sweet gift he prepared for his ex-girlfriend, and said, "In high school, I made an album with photos from our date and wrote down the things we did on that day like a diary. It was about 50 pages."