This manga urgently needs a Chuunibyou tag. It feels like the author took all the fantasies of a Chuunibyou kid and turned them into a plot. If that's true, I have to compliment them because, despite the plot having more holes than a sieve, it's still funny, and the art is good too. As many other comments have noted, you need to shut your brain off to read this.
Actually, here are some practical recommendations if you wish to proceed:
1. Always shut your brain before reading; you don't need it, and it'll only get in the way of fun.
2. Enjoy the art.
3. Expect only slapstick comedy and be amused if there's something else.
4. Embrace your inner adolescent and all the Chuunibyou experiences you had, then cringe at how far beyond this goes.
5. Remember to turn your brain back on after enjoying this... experience.