Transmigration to a doomsday novel

Xuran transmigrated to a doomsday novel he read last night in which the male protagonist liked the female protagonist and chased her hard , finally she agreed. The villain who constantly had conflicts with the female protagonist later died on a mission while searching for supplies.
Later the male protagonist got betrayed by the female protagonist and she took all the supplies he had collected and fled pushing him to a dead end.

Xuran transmigrated into the male protagonist who had the same name and age as his. And he possessed a magical space.