A continuation from Star in My Mind with a focus on different characters, but this is better.

I enjoyed Star in My Mind a lot despite relatively weak plot because the leads are lovable. Sky in Your Heart is surprisingly better. The plot is still not exactly top-notch, but it is pretty good. Fah, a doctor, meets Prince, a volunteer teacher, and we know what will happen.

Perhaps because the characters are slightly older and this is not another BL series with a university campus as its main setting, there is a bit more unpredictability in the plot. Prince falling sick, however, is an overused plot device to get things going and the writers could have toned down on it. Nevertheless, the leads are likable, just like in Star in My Mind. We feel for Fah because he is unable to get over his ex, but the series doesn't make this sappy. There are many humorous moments in the series with the joke being on Fah. And though I wish Prince were more rounded as a character, he is the sort of character that's easy to love.

Compared to Star in My Mind, the side characters here are more distinctive. Whether it's Fah's friends (Mesa and JJ) or Yayah the young lady or the comical Ou (nicely acted by Toptap), the side characters each have something distinctive. (In Star in My Mind, there are many side characters, but there's a lack of distinctiveness for most of them.) It's a pity that the pompous Ou seems to largely written out of the story after his initial appearance. The character has the potential to play a bigger part in the story, especially because some of the best moments in the series are the funny parts. (Watch out for the scene in Ep 3 when Ou offers to take a photo with Fah and his friends as a "present" for them. When the photo is being taken, JJ turns his back to the camera. It's hilarious, but I think it's also a deliberate allusion to the rumored falling out between Toptap and Mike, the actors for Ou and JJ respectively.)

Dao and Kluen from Star in My Mind appear every now and then despite being in a totally different place from the leads. Most of the time, it doesn't really make a difference whether they appear or not, but I guess fans of the DaoKluen ship won't mind.