because they are bored?
need more stimulus to pump their adrenaline.
in some case because they are get radical ideology
there is war's volunteer, join ISIS to become terrorist
before SAO there is full dive game : ./Hack
korean manhwa Yureka has full dive gear too
and there some popular korean novel about full dive game such as Moonlight sculptor
Reverse isekai :
- Death mount death play ( try search it on other site, since its licensed manga )
- Nihonkoku shoukan (like GATE )
- Drifters
- Reincarnation no kaben
- Saving 80,000 Gold Coins in the Different World for My Old Age
Not isekai but has historic figure :
- Shuumatsu no valkyrie...
here is some bittersweet manga :
- Shigatsu wa kimi no uso
- All you need is kill
- Deep love (its shoujo with many spin-off) : ayu, reina, dog, and 1 again heart failure man
- Saishuu heiki kanojo
- Kimi no knife
i know some title with LGBT bait
Tensei Kyuuketsuki-san wa Ohirune ga Shitai
Urasekai picnic
Kuma Kuma Kuma Bear
Kenshi o Mezashite Nyugaku Shitanoni Maho Tekisei 9999 Nandesukedo!?
While Killing Slimes for 300 Years, I Became the MAX Level Unknowingly
Watashi, Nouryoku wa Heikinchi de tte...
OP MC with OTP : kenja to mago
revenge : Tate no Yuusha
approved harem : Genjitsushugisha no Oukokukaizouki
comedy : konosuba
shoujo : Koushaku Reijou no Tashinami
food/ cooking : Isekai Ryouridou
love...