
Lucian, an immortal who has lived for five thousand years, has witnessed the rise and fall of human civilizations across millennia. Everyone who once walked beside him faded away with the passage of time, leaving him trapped in endless loneliness beneath his eternal life. Fifty years ago, he saved Silas Thorne from the brink of death and took him as his only disciple. In his twilight years, Silas fell gravely ill. On his deathbed, he begged Lucian to protect the Thorne family and his granddaughter Sienna Thorne for a full three years. Lucian agreed to the pact, and at Silas’s request, he married Sienna in name and moved into the Thorne household as a live-in son-in-law to keep them under his watchful protection. To conceal his extraordinary identity, Lucian posed as an unestablished substitute history teacher at a university. He cooked every meal, handled all household chores, and drove Sienna wherever she needed to go each day, enduring constant disdain and mockery from Arthur Thorne and Eleanor Thorne. To the outside world, he was nothing more than a useless dependent clinging to a wealthy family. With only three days remaining before his three-year guardianship vow expired, gan…