Cover SongDELUTAYADELUTAYA Covers Vocaloid Classic “Happy Synthesizer” for Her Debut Cover EP AdminAugust 12, 2026August 12, 20262 mins0DELUTAYA (Δ.DELUTAYA) has released a cover of ハッピーシンセサイザ (Happy Synthesizer), and it’s not just a standalone single…
