Finding novels with Apocalypse genre, it can be either pre- apocalypse or post-apocalypse. It can also be BL. Thank you guys!
Dominion's End Number one Zombie Wife My Cherry Will Explode in the Apocalypse The Reborn Otaku’s Code of Practice for the Apocalypse Thrive in Catastrophe
BL 1. End of World’s Businessman (OG) 2. Young military rarities (OG) 3. Back to the Apocalypse (C) 4. Number one zombie wife (?) 5. Corpse Wins After The End Of The World 6. The End of the World (OG) 7. The Reborn Otaku’s Code of Practice for the Apocalypse (C) 8. Rebirth of MC (C)
BL A Filthy Rich Hamster in the Apocalypse After Brushing Face At The Apocalypse’s Boss For 363 Days Dangerous Survival in the Apocalypse Fierce Silk Flower
BL: Earth Vast Changes (though I think there isn't that much intimacy, but not that unexpected considering the genre. The ML is super cute and kind of tries to hide his strength unsuccessfully =) https://www.novelupdates.com/series/apocalyptic-rebirth-earths-vast-changes/