Fish Upon The Sky and 2gether are adapted from two novels by the same author (JittiRain). The dynamics between the leads are similar: Sarawat (in 2gether) and Mork (in Fish Upon The Sky) are in love with the protagonist since the very beginning and they spend more than half of the series courting him, while the protagonists are oblivious and initially can't accept their feelings for their love interest. Both series are lighthearted, but Fish Upon The Sky is also characterized by a strong parodic tone.

They both center around the quest for true love and resort to gender swap as a plot device. They even have the same soundtrack.

They both center around fate, reincarnation and the rejection of homosexuality in the Thailand of the late 20th century.