Dungeon/Action I hv read

My first dungeon manhwa.
Mc reads a novel for 10 years and the world becomes that novel.
From the spoilers he will sacrifice himself to give everyone a good ending

My second love- I mean manhwa,
Mc got super speed and his sensei got lightning.
You know what? Electricity+ speed = Eleceed
Superpower

Murim
Martial arts
Love with the art style it feels so traditional.
Unsure about the story sm1 said it has romance

Forgot what happens here will add later