Until My Loser Skill "sleeping Together" Is Awakened And I Build The Strongest Harem summary:

Regnard defies expectations by enrolling in the esteemed Royal Academy of Lasarzia despite being a dropout. However, during the Blessing Ceremony, he receives a peculiar skill called "Blessing of Sleeping Together," leading to ridicule from classmates. Despite the mockery, Regnard discovers the true potential of this skill when he spends the night with Frost, an honor student. This revelation leads to unexpected adventures and a harem fantasy, as Regnard navigates the challenges of his newfound abilities and hidden desires.