ONE PACT teases the 'SANE·inSANE' universe through their EP '1'ONLY. This project aims to delve deeper into two contrasting identities, adding elements of surprise to draw in fans. The sound and lyrics of the tracks are expected to reinforce these themes, as ONE PACT plans to achieve musical evolution through this. Fans are eagerly anticipating what emotional experiences this new universe will offer. Furthermore, 'SANE·inSANE' is building intrigue as it promises to go beyond mere symbolism to convey complex emotions through a profound narrative.