The Grand Catalogue

After getting strong-armed by a temple elder, Kang Heon is stuck taking charge of The Grand Catalogue: a record of all male...members of the continent. Things only get worse when a single blunder involving Eihelen Eijin, a newcomer from the Western Continent, sends everything spinning off-course. Forced to cover up the accident and guard their respective secrets, the two join forces to complete the catalogue, stumbling into revelations about themselves (and countless men!) that neither was prepared for.

(Source: Lezhin US)

Note: Includes 11 extra chapters.