>>282893458
The original says "lending". She's basically a Bleach captain who saves the MC from a Hollow encounter at the start of the story, contracting him as a "slave" to fight their way out of a tight spot. This temporarily transforms the MC into a Digimon steed, but after it wears off, the master is magically forced to reward him (usually with ecchi, which she didn't realize until trying it on a human like this for the first time).

The cucking part kicks in when she discovers she's able to "lend" her slave to other riders (while paying the mana upkeep), which gives the MC alternate Digimon forms, and forces the alt rider to reward him afterward. This turns into a cuck carousel as all the other captains start wanting their turn with the MC at her expense, and she has to restrain her seethe because of the tactical benefits and occasional emergencies.

Oh, and their version of Earth is ruled by women because only girls can gain superpowers. Source is Mato Seihei no Slave, aka Chained Soldier.