Hi, I am making this post for anyone who likes to know when a certain event takes, such as first kisses when the leads get together if there are any breakups, and anything else that pertains to the show. WARNING this post WILL contain spoilers, so please do not view it if you want the surprise factor in your watching. Okay now here are some timestamps/spoilers for Heartbeat:

Ep 2. Inhae finds out Woohyeol is an actual vampire

Ep 3.  First kiss

Ep 4. The descendant of Woohyeol's first love appears

Ep 11. Inhae confesses her love to Woohyeil

Ep 12. Inhae and Woohyeol start dating (unofficially)

Ep 16. Haewon moves on from Woohyeol; the missing gold is found

My rating: 7

Happy watching!