After Mistaking One Person for Another, I Became My Childhood Friend's Love Rival

Song Qi has always liked Lin Ruoxi. After two years abroad, he comes to Xiangnan No. 2 High School relying on the few memories he has left, but Lin Ruoxi has gained fifty jin, so he doesn't recognize her. Mistaking her twin sister, Lin Ruoxi, for her, he pursues her instead. Meanwhile, the “Lin Ruoxi from Class Three, Senior Year” Shen Yanting asks about is actually her chubby little sister, the “little sunshine” from his childhood. Thinking she's the person he remembers, he falls for her completely. Both are caught up in mistaken identities. As it happens, Song Qi and Shen Yanting are childhood friends, and a rivalry between them, sparked by a misunderstanding, begins. But the scheming Song Qi actually just can't stand how well Shen Yanting is doing. Whatever Shen Yanting likes, Song Qi wants for himself.