Recommendation · 投稿日: 2026-09-09

A cute, obsessive younger man's thorough plan to win over an older woman! <Because I'm Immature>

Hello!

Today, I'd like to introduce a romance webtoon.


Currently serializing on Naver Webtoon, <Because I'm Immature>

features an obsessive romance that blooms

within a dizzying relationship built on a lie.

"Sis, Il-do is... my junior at college, I'm telling you!"

This unexpected remark from her younger sister

completely tears off the perfect mask of 'Il-do',

whom she thought was just her innocent student retaking his entrance exams.

As the secret behind why he, who was already admitted to Hanguk University,

hid his true identity just to hover around his tutor 'Ha-ji'

is slowly revealed, the relationship between the two

begins to shift.

From the moment his identity is exposed, Il-do's

relentless affection and obsession begin to

wildly shake up Ha-ji's once ordinary life.


Let's start the review!



29 years old.

Still making frequent mistakes at work,

wedding invitations from friends are piling up,

and even love comes face-to-face with cold reality.


The protagonist, 'Ha-ji', receives a breakup notice

from the boyfriend she truly loved.

Feeling anxious after hearing her friends' wedding news,

bringing up the topic of marriage just yesterday turned out to be a fatal mistake.


Her boyfriend gives her a ride to the house where 'Ha-ji'

tutors for her side job after work.

On the way, he points out 'Ha-ji's' realistic problems one by one—

the debt left by her late parents and the burden of supporting

her college student younger sister all by herself.

'Ha-ji' cannot refute a single word he says.

Because she knows it's the harsh truth.


The two arrive at her destination in a heavy atmosphere.



"I-I'm really sorry for bringing up such unnecessary things yesterday.

 It's not like I wasn't aware of my realistic problems..."


Trying to wrap up the conversation and get out of the car,

Ha-ji is stopped by her boyfriend, who, as if to relieve his own guilt,

replaces his final farewell to her

with a long-winded apology.


"You are the best woman I've ever met.

 The fact that I'm blaming these realistic problems means I'm the one...

 who doesn't deserve to be with someone like you."

"Meet a good person who won't make you say things like this."

"I have a blind date set up next week with a female lawyer like me.

 ...I'm sorry I couldn't let you go sooner."


Her boyfriend's last words left a massive shock on Ha-ji,

who thought she understood her cold reality better than anyone,

no matter how worn out she was by life.


But business is business.

Since her scheduled tutoring session was coming right up, Ha-ji

pulls herself together and heads in to face reality once again.



"Il-do~ Did you properly review the parts we talked about?"


Sitting in front of Il-do, a student supposedly retaking his exams, Ha-ji

tries to treat him with her usual cheerful voice.

However, the look on Il-do's face as he stares at her is subtle.


It was because it wasn't easy to ignore Ha-ji's eyes,

which were swollen like a goldfish from crying so much.


"...Excuse me, am I supposed to pretend I don't notice?"

"I have absolutely no idea what you're talking about, Il-do~?"


Ha-ji smoothly dodges Il-do,

who persistently asks her what happened. However, she unintentionally reacts

when he bluntly asks if she broke up with her boyfriend.


"Hmm? Ho-oh? Why in the world would you think that~?"


She tries hard to play it off while trembling anxiously,

but the perceptive Il-do has already seen right through her.



"You can talk to me about your worries, teacher!"


Il-do starts acting stubborn with his signature sly expression, 

and as soon as Ha-ji sees his face,

she gets the feeling that he won't let it go until she answers.


Eventually, Ha-ji calmly explains that it was a breakup caused by

the economic disparity between her and her boyfriend

and the realistic problems stemming from it.

Il-do, who had been quietly listening to Ha-ji's story,

speaks his mind the moment she finishes.


"That old guy is always just talking about money, money...

 You should meet a man(?) like me who knows what real love is now."


At Il-do's words, Ha-ji counters with a dagger

hidden behind her signature bright smile..


"Even if I were your age, I don't think I'd see you as a man, Il-do!"



"I'm somehow scared of handsome, sociable guys like you.

 I prefer a guy with a faint, unmemorable impression who works at the local town office!"


Ha-ji's added description of her ideal type

is completely beyond Il-do's comprehension.

Even so, Il-do hopes that Ha-ji will lean on him

whenever she goes through a hard time.


Ha-ji flawlessly deflects Il-do's subtle flirting

while maintaining her firm boundary as his tutor.


After the tutoring session ends, Il-do sees Ha-ji off

as she leaves the house. To Ha-ji, who mentions reviewing lessons till the very end,

Il-do stops her, saying he has something to show her.



Then, putting on the glasses he had prepared,

he throws out one more flirtatious line.

Il-do's cute flirting finally manages to bring out

a laugh from Ha-ji.


Given his inherently handsome features, Il-do couldn't possibly pull off

the faint, nerdy vibe that Ha-ji wanted.


"I can't really change the fact that I have a handsome face...

 Teacher, it won't matter even if it's not him.

 Because there will always be plenty of other men who will like you."


Il-do's sincere consolation touches Ha-ji's heart,

and she genuinely thanks him before saying goodbye.



After Ha-ji leaves, Il-do plops down right where he's standing

and buries his flushed red face.


"Wow, this is crazy...

 She's incredibly cute..."


Meanwhile, Ha-ji returns home and browses through her friends' social media.

Seeing all the posts announcing they've found their match and are getting married,

Ha-ji feels somewhat bitter.


"They say it's the era of staying single and everyone's broke,

 but it seems like everyone except me has plenty of both love and money."


From friends getting married early with a set plan,

to those turning away from romance completely to live

their own independent lives...

Ha-ji thinks she can't seem to fit into

any of those groups.


Trying hard to shake off her depressing thoughts, Ha-ji thinks of her one and only 

younger sister, Ha-sol.

And when she visits her sister's social media, she spots an unexpected

person.



"H-How do you know Im Il-do?"


Her sister, who just got home, looks baffled as she watches 

her older sister rush at her with a panicked face.


"What? How do YOU know Im Il-do?

 Im Il-do is a freshman junior in my department."


Ha-ji, who had been pouring her heart into tutoring with the firm resolve

of getting a struggling student into college.

Upon discovering the fact that he was already a college student,

Ha-ji is thrown into utter confusion.


Just what in the world was Il-do thinking when he deceived Ha-ji?


This is <Because I'm Immature>, currently serializing on Naver Webtoon.