"When a Man Falls in Love" Kim Sung Oh appears to be acting very suspicious.

May 22, the 15th episode of the MBC drama "When a Man Falls in Love" featured Lee Chang Hee (Kim Sung Oh) trying to attack Seo Mi Do (Shin Se Kyung) for the second time.

After hitting Seo Mi Do with his car, Lee Chang Hhee had left a letter for Han Tae Sang (Song Seung Hun). Lee Chang Hee wrote, "I wanted to tell you first. I wasn't brave enough to tell Jae Hee (Yeon Woo Jin) first. I just changed Jae Hee's life. Jae Hee is not my real brother."

After writing the letter, Lee Chang Hee hides it inside of the back cover of a photo frame. Lee Change Hee prepared the letter for Han Tae Sang just in case something happens to him. There seems to be a darker secret in the relationship of these three men.

Lee Chang Hee then reveals to Han Tae Sang that he had been the one who attacked Seo Mi Do. He then tries to convince Han Tae Sang that Seo Mi Do is putting on an act in front of everyone, pretending to have lost her memories.

Lee Chang Hee approaches Seo Mi Do while she is in the playground by herself and says, "It's me, Lee Chang Hee. Can you remember me?"

Just like a scene from a horror movie, Lee Chang Hee takes Seo Mi Do deep into the mountains in her wheelchair. At the top, Lee Chang Hee tells her, "Jae Hee is my little brother. Pretending to not remember and pretending to be unable to walk. What are you calculating? If you don't remember, just know this. Even if you remember Jae Hee, act like you don't."

Also, Lee Chang Hee adds, "Take your time looking around and walk down with your two legs. Even when all your memories come back, don't play around with people" and walks down the mountain by himself. However, Seo Mi Do falls from her wheelchair and hits her head one more time.