 If you liked Kiseijuu: Sei no Kakuritsu |  ...then you might like Chainsaw Man |
At the beginning of both series; the main character fuses with a super natural creature in order to eventually go on to use the power of the creature to fight others of it's kind. Both have similar tones and OSTs.
report Recommended by JVskunkape
Main theme: cooperation with another species and being a connector of two worlds.
- Both shows have same premise about monsters and humans - Both shows have same main characters about want to have a normal life - Both shows have same concept when a supernatural entity posess the main character - Both shows have human vs supernatural entities fights/wars
report Recommended by Natsuki_SanJuan