I'm Really Weak After Reincarnating in Another World

I'm a shut-in who often watches anime, and somehow I've been reincarnated in another world. What a hassle. Maybe I should just slack off... But can I really get away with doing nothing? In this world of swords and magic, there's the Demon King, the Hero, alchemy... They're all pretty common, but just thinking about them gives me a headache. Well... I'm really weak, after all... Really... weak?

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.