Kami nomi zo Shiru Sekai, Kanojo ga Flag wo Oraretara Recommendations
An aloof main lead trying to conquer girls either in the name of life and death, or a mission. Kanojo Flag is a bit darker, but overall they have the same feel plotwise.
Both anime's have to deal with raising flags, which are in turn are related to dating-sim games.
They both are rom coms which also help :)
Both Male MC conquers girls based on flags (death, love, etc.) and indirectly creates a harem in the process. TWGOK goes using date-sim tactics while Kanojo is given the power to see flags. At some point in their respective shows, the girls will lose their memory of meeting Male MC but eventually will gain it back. (Amnesia)
Both male protagonists can conquers girls like if they were on a game.
katsuragi only uses his kwoledge from games to conquer the girls, but in case of souta he has an ability to see event flags
So, Gaworare also deals with how the protagonist tries to live normally despite his ability to "predict" the future with the flags over peoples heads.
The MC in Kami nomi zo Shiru Sekai is somewhat a god of conquering girls with a twist, yet he is not enticed with his skills for he is in touched with his gaming.
On the other hand the MC on Kanojo ga Flag Oraretara was 'cursed' with a power to see flags for possible current situations which make him conquer girls then possible help her according to her flag showing in her head.
Nevertheless both show's show a great similarities concerning their abilities.