Triangle Heart: Sweet Songs Forever  

TH: SSF, Triangle Heart, 트라이 앵글 하트: Sweet Songs Forever, とらいあんぐるハート ~Sweet Songs Forever~, とらいあんぐるハート -Sweet Songs Forever-

Fiasse is a well-known singer who has recently become the headmistress of a singing school. Every year, she embarks on a charity world tour to share her talents with others. Unfortunately, after her mother passed away, there were some shady individuals who sought to claim the inheritance left behind. To protect Fiasse and the inheritance, Ellis, Kyoya, Miyuki, and their companions have been tasked with safeguarding their childhood friend at all costs. Despite this, Fiasse remains determined to continue her world tour and share her music with the world.