SEKAI NO OWARI releases their first single of 2026 commemorating the 15th anniversary year since their major debut! The title track "Stella" is composed by Nakajin and written by Fukase. Opening with graceful piano melodies, heavy bass and sharp-edged guitar create a powerful groove while strings delicately and elegantly overlap to bring rich depth to the sound. An emotional killer tune with an exhilarating beat that raises the heartbeat. The lyrics woven by Fukase seem to portray finding hope while facing oneself despite being tossed about by fate, and emotions transforming into strong determination through the accumulation of small resolutions. It becomes a song that releases emotions through the resonance of SEKAI NO OWARI's signature grandeur and stirring dynamism. "Nemurihime (Happy Ending Version)" is an anniversary work re-recording the representative song "Nemurihime," originally released in 2012 and still loved by many listeners, commemorating the 15th anniversary of their major debut.