I feel a kind of ashamed to tell you, lol, because it’s my guilty likpleasure.

guilty pleasure is used to describe something that you are guilty for liking.

On the other hand, I love watching romantic superhero stories because Iit is so amusing, the dynamic of saving a city and falling in love.

Regarding what is about, it is about two guys, a girl and a boy in the same Sschool, that become superheroes to save the city of evil.

I feel a kind of ashamed to tell you, lol, because it’s my guilty likpleasure.

On the other hand, I love watching romantic superhero stories because Iit is so amusing the dynamic of saving a city and falling in love.

I'm not sure you mean 'amusing' because 'amusing' means funny, as in funny - haha! As in, it makes you laugh. I think you maybe mean 'entertaining' or 'ridiculous'? I could be wrong, it is quite funny that one guy thinks he can do everything single handedly...

Regarding what it's about, it is about two guys, a girl and a boy in the same Sschool, that become superheroes to save the city of evil.

Why don’t you come to my house and we can watch the show together?

Writing aAn iInformal eEmail

Task instruction: In your next letter, please tell me all about your favourite TV programme.

British English = favourite, US English = favorite

Whyat do you like watching?

What do you like watching? = what kind of tv shows do you like to watch?

What's it are they about?

Hi, Carl ¶
,¶
¶
I hope you are well.

The comma always comes after the person's name in an email.

You know life, studies, family, love.How's everything with you?

This is not really a full sentence. You can combine this with the previous question: "How's everything with you?" covers all of these topics.

As for my favorite TV program.,

Sentence fragment, it needs a second half to make it a full sentence.

I feel a kind of ashamed to tell you, lol, because it’s my guilty likpleasure.

lol is usually used in text messages, but not so much in emails.

Anyways, Iit is "Miraculous “tTales of lLadybug and Cat Noir”.

On the other hand, I love watching romantic superhero stories because Iit is so amusing; I like the dynamic of saving a city and falling in love.

This is a really long sentence. It makes more sense to break it up in the middle with a semicolon.

Regarding what is about, iThe plot is about two guys, a girl and a boy in the same Sschool, thatwho become superheroes to save the city ofrom evil.

to save something from something --> to save the city from evil
For people, the correct conjunction is "who".

Why don’t you come to my house and we can watch the show together?

Anyway I gottaneed to go now, make sure to write back soon!