I Think I Transmigrated Into A Japanese Romantic Comedy

When I woke up, I was in a classroom.
I tried to get a hold of my raging headache and looked around.

It looked oddly familiar to stuff I'd usually see in anime and light novels.
There's red, green, blue, pink, golden and various other types of coloured hair on the heads of these teenagers who are supposed to be my classmates.

The clues say it is a Romantic Comedy.
Yet I do not have a single inkling as to whose body this is and how I have landed here.

'System, give me my goddamn starter pack with the original body's memories and a damn Japanese Language package'
Neither is any System reacting to my sincere request.

'You damn incompetent god or goddess that has dropped me in the middle of a damn classroom with no fucking support, respond for fucks sake or I'll burn your damn shrines'
Nor are the gods or goddesses responding to my earnest pleas.

And this bloody headache won't go away either.
Fuck, I need to get my memory before someone realises something's off.

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Tags - (alternate world , beautiful female lead , caring protagonist , curious protagonist , calm protagonist , depression , early romance , love interest falls in love first , male protagonist , past trauma , proactive protagonist , transmigration )

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First time writing a novel (rip me apart but please valid criticism)
Ok so main features of this novel are:
- No beta MC, just a normal person who's been through shit.
- It is my take on a transmigration. I chose realism.
- No NTR or any wierd shit here. This is a long and steady journey.
- alot of internal monologue. This novel is truly going to be from the perspective of the MC. We will get to hear his true and complete thoughts no matter how stupid or irrelevant they may sound. I have done this to build character and give an insight into how MC thinks.
- romance but no harem. Have main FL kind of figured out and main points of focus
- the story will also try and focus on the original novel the MC transmigrated to..
- wanna try character development and see what I do in my first try.

This will take alot of chapters. How many? I don't know.
Each chapter will be meticulous, The issue is that it takes 20-30 mins to get the general plot and filling out the whole chapter takes like 5+ hours. Proof reading isn't an issue and that only takes about 20 mins.
Either way I do hope you enjoy reading the novel as much as i enjoyed writing it