Male Lead Falls in Love First

Rowoon seemed to start developing a bit more serious romantic feelings towards Doha in chapter 38. He started noticing her presence more, how he felt when she was close to him, touched him, the way she smiled, and the way she looks.

I'm pretty sure it was love at first sight for Hann

He fell for her in the very beginning and acknowledged his feelings for her in chapter 12 already. It took Elena a long time to fall for Johann, but his unrequited love became requited.