The sequel of the first book, BTS' fifteen-year-old daughter, Brittle is struggled towards her relationship with her boyfriend, ENHYPEN member and former ice skater, Park Sunghoon while the other members of ENHYPEN are reunited with BTS and Brittle's creatures also known as the BT21. ENHYPEN's leader and Brittle's estranged idol, Yang Jungwon is obsessed with her and he tries to win over Brittle against his member, Sunghoon, Jungwon gets revenge by making her jealous together of his lifeline and fellow ENHYPEN member, Jay. Brittle burst her anger and gets disappeared after she accidentally reveals her bias in ENHYPEN is actually Jungwon. HYBE's girl group, LE SSERAFIM is secretly hiding Brittle told by the girls' producer from the obsessed ENHYPEN. Later the ENHYPEN confessed to LE SSERAFIM girls that they didn't mean to hurt Brittle's relationship with Sunghoon. It's up to the LE SSERAFIM and ENHYPEN to change her. Brittle celebrates her 16th masquerade birthday party. During her party, Brittle drinks a wine but turns out that she got poisoned by someone and she is pursued dead. Sunghoon witnessed a poisoned Brittle, later he decide to kiss her or she will be dead, he kiss her but she didn't wake up then, Sunghoon kisses her again, waking up. Also known as "The Girl with the BT21: Broken Relationship" 1-25 Chapters
24 parts