Betta is adapted from a novel. Betta Fish's novel Little Daisy tells the story of her love with the underworld eldest brother from a girl's perspective. The adapted TV version not only depicts the love story between the darling sister and the underworld eldest brother, but also focuses on the brotherhood of Yu Hao, Dan Jiejie and Yang Xunqi and the social problems existing in Taiwan Province Province, and tells the story with Dan Jiejie's voice as a voiceover, that is, as a bystander of the love between Swallow and Yu Hao.

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Different from the spoony Cinderella story in Meteor Garden, Betta Fish is an idol drama in publicity, but it reflects many social problems in Taiwan Province Province besides starring several young idols. Three boys who were forced into the underworld because of family problems struggled and hesitated, but the pressure of life forced them to choose a shortcut, and finally the fact that they were physically dead and disabled told them that they must stay away from the underworld.

Compared with meteor garden, fighting fish is much more cruel. The love in the play, like the love of Doumyouji Tsukasa in Meteor Garden, is unconventional. One is a street prodigal and the other is a pure and lovely girl who grew up in the most favorable environment. They thought love was love, but they rebelled against the family and came together. What they found is that this pure love does not exist, ideal and ideal. Compared with the pure idealism in Meteor Garden, this kind of love arrangement is obviously much more real.