Help me find it bestie ⸜(｡˃ ᵕ ˂ )⸝♡

A full-colour Korean BL manhwa set in a modern world where the brown-haired MC is transported into what feels like a novel-like reality with no system guidance, and he is assigned a role where he becomes the kidnapped captive of a rich, possessive heir/CEO-type ML; early in the story the MC is literally chained and confined in the ML’s luxury apartment or residence, but he secretly enjoys the kidnapping and BDSM-like dynamic while pretending to resist to stay in character; the ML and MC may have known each other when they were younger or have some prior connection, and the MC spends most of the story in confinement gradually developing a genuine relationship with the ML until they reach a happy ending together, after which the MC is suddenly transported back to the real world where he works in a corporate setting and unexpectedly meets the ML again as his boss or executive-level superior, and they eventually recognize or remember each other and reconnect romantically.