Responses
Radio Storm, Creature in The Mist (not zombie but similar to), Dead Man Switch. Those are only i know
Here are some I read which had this concept, if I find more I'll share:
https://www.mangago.me/read-manga/zombie_hide_sex/
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https://www.mangago.me/read-manga/a_dead_crow_s_stare/
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https://www.mangago.me/read-manga/the_last_zombie/
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https://www.mangago.me/read-manga/the_unfeeling_me/
ZOMBIE YAOI/BL ANYONE? I NEED TO STEP UP MY READING LIST UGH