They both have cases involving murder of a family member. Both include mythic parts. In I hear your voice one of the main characters have read thoughts while in Life on Mars the main character travels back in time.

Both have female lead acting/believing they are someone else. The male lead acts offensive in the beginning in both dramas.

In both the main girl characters did plastic surgery to feel pretty. In 200 pound beauty she was bullied a little. Where my ID is Gangnam Beauty she was bullied severely.

There is time travel in Somehow 18, and the male lead knows about the future. In thirty but seventeen she was in a 13 year old coma, so she’s doesn’t know anything.

In reunited worlds it’s more magic how he came to the present. He basically time traveled. Where in thirty but seventeen she was in a 13 year old coma, and then came to present. Both main characters don’t know about present time.

Both main guys don’t recognize main girls. Both have strong female characters that want to justify their decisions they made.

Time travel in both. Both get men to fall in love with her. Main guy in beginning doesn’t like main girl.

Both have time travel, and wish to go back home at times. Main guy also reluctant to like main girl, too.

Both main girl’s take on different identities. The main girl in both struggle with their new identities.

Both main girls hide secrets from main guy. In Nice witch her identity, and in Secret the fact that she didn’t kill main guy’s girlfriend. Both main guy’s in beginning don’t like main girl.

Both dramas have main girl hiding identity from main guy. In both second lead characters try to get to top. The main girl in both are thought as weak in beginning.