For a certain reason, Anon enrolled at Haneoka Girls' High School right before Golden Week. She learns that bands are popular at the school and rushes to find band members. She invites the Haneoka's Weirdo Girl, Tomori, to form a band, but... 爱音因为某些原因在黄金周开始前进入羽丘女子学园就读。她得知羽丘很流行组乐团后急着寻找组乐团的成员。而她邀请「羽丘的怪女生」灯组乐团后……。

Tomori refused Anon's invitation to form a band. In order to find band members, Anon headed to the live house RiNG, but she was then reunited with someone she didn't want to meet. "She clicked her tongue!" 爱音虽然邀请灯组乐团，但却被她拒绝了。爱音为了找寻乐团的成员而动身前往LIVE HOUSE「RiNG」，却在那里和最不想见到的人重逢了。 「她啧了一下！」

"I want to be a human." The clumsy Tomori finds herself unable to fit in with her surroundings. In the spring of her 3rd year of middle school, she ran into someone who would change her life, thanks to a fragrant snowbell flower... 「好想成为人类啊」，笨拙的灯一直无法融入周遭环境。在国三春天，她受到玉铃花的引导遇见了某个人……。

After hearing about CRYCHIC's breakup from Soyo, Anon gathered Tomori, Soyo, and Taki at RiNG. And then... "All right, talk it out," she says. 爱音从爽世那里听说CRYCHIC解散的经过后，她将灯、爽世、立希找来「RiNG」。 「来，开始沟通吧！」

The band was formed with a promise that they won't disband until their first live gig, but Anon refuses to practice seriously. And so, Taki told Anon, "Aren't you just running away?" 当初明明是保证在第一次演唱会结束前都不会解散才组成乐团的，但爱音却都不认真练习。面对这样的爱音，立希提出质问——「我看妳只是在逃避吧？」

"I'll play the band." The sudden appearance of Rāna confuses everyone. The training sessions for the live gig isn't going well, and Taki starts becoming frustrated. 「我要玩乐团」 乐团的成员们都被突然出现的乐奈整得团团转。 为参加演唱会所做的练习迟迟不顺利，立希也变得越来越焦躁。

Through all the mess, they made it to their first live gig. As their feet tremble, they stand on the stage, ""Even if we're still lost, I want to move forward," Tomori says." 虽然过程手忙脚乱，但第一次演唱会的日子终于还是到来了。 灯双脚颤抖地踏上了表演舞台。 「迷失方向我也想继续前进」

After a full year of training at the Adventurers' Guild, Luciel went to the Healers' Guild to renew his card. Luciel tried to find a new place to work at, but Brod then appeared. After that, Luciel returned to the Adventurers Guild again, but then, the head of the largest clinic in Merratoni, Bottaculli, entered the guild by force with some armed guards on his side. 爽世看到因为「春日影」擅自被人演奏而流下眼泪的祥子后大受打击，并失去了连络。 那段期间，祥子将初华约出来见面……。 「初华还是一样喜欢星星呢」

Soyo has always been well-behaved since her childhood. For Soyo, CRYCHIC is more important than anything else. She thinks, "That was not a breakup." 爽世从小就一直扮演着周遭的人们所期望的角色。对爽世而言，CRYCHIC是比什么都重要的存在…。 「那不是解散」

The band members have gone their separate ways. While unable to come to terms with their feeling, Tomori went into the planetarium and meets Uika. Songs can reach out to others, don't they? 乐团成员分裂四分五裂。始终没能整理好心理情绪的灯来到了星象馆，并遇见了初华。 「用诗感觉可以传达出去」

Tomori's song moved Anon, Rāna, Soyo, and Taki. They are finally together again. However, it turns out they already have a reservation for their next gig. "Hang on! Don't you all forget something that's more important?" 灯的诗打动了爱音、乐奈、爽世、和立希的心。 原以为事情终于落幕，但她们这时得知已经预约好下一场演唱会的档期。 「等一下，大家是不是把更重要的事忘记了？」

The five girls have finally reunited as the Lost Band. While they somehow managed to finish their song and costume in time, they are still heading into their gig rather sloppily. "You said you want to do a gig, and now you're reluctant?" 五人终于重新集结，组成了「迷路之子乐团」。虽然总算准备好了歌曲和服装，但五人最后手忙脚乱地迎接演唱会的到来。 「明明想好好办场演唱会的，又搞成这样！？」

MyGO!!!!! is doing a celebration party after a successful gig at RiNG. "I wish you happiness."演唱会顺利结束，MyGO!!!!!的成员们在RiNG举行庆功宴。 「祝你幸福」