Shall I Write Your Love Letter?

Employee-of-the-Month champion and service-industry all-rounder Lim Seongshik thought he'd seen everything, until he wakes up inside a bleak BL novel as none other than Elliot Brown, a minor villain doomed to die. In the original story, everyone meets their end at the hands of the protagonist, Arzen Theron. So Elliot decides to keep his past life as a writer hidden, lie low, and quietly avoid the one event that triggers the tragedy: ghost-writing a love letter. But life—and his cat—have other plans. A desperate situation forces him into becoming Arzen's personal bed attendant, of all things. To make matters worse, his "secret identity" as a writer gets exposed to the novel's original love interest. Before he knows it, Elliot is back to ghost-writing letters... this time for Arzen himself! But something's off. The Arzen in front of him doesn't match the cruel lead he remembers... Can Elliot keep faking those letters just enough to dodge his scripted death ending? Or has the story already started to change? (Source: Lezhin Entertainment)