Johnny_Sensei

Our Secret, Our Sin

Haruto’s life was supposed to be simple—just another forgettable high school student with a quiet past. But when his father suddenly remarries, he finds himself living under the same roof as Himari, his new stepsister… the one girl he could never forget.

She was his first love. His first regret. And now, his biggest temptation.

Forced to suppress their growing feelings, Haruto and Himari struggle to keep their relationship normal. But when a single mistake puts them in the crosshairs of Ryosuke, Haruto’s so-called "friend," their fragile secret is threatened. Ryosuke holds a photo—a single moment captured in time that could destroy everything.

But Ryosuke doesn’t know who Haruto really is.

Because Haruto has a past. A past so dark that if anyone uncovered it, his entire world would crumble.

As love and danger intertwine, Haruto must fight against the sins of his past, the desires of his present, and the uncertain future that looms ahead.

How far will he go to protect the one person he can’t live without?

And when the truth is revealed… will love be enough to survive?


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Our Secret, Our Sin

No shadows lurking in the background.

Tomorrow was Haruto's 18th birthday, but today—Hemari, Satsuki, and Takashi wanted to make sure he had a day where he could just be… himself.

Haruto, of course, found the whole thing ridiculous.

But when he saw the excitement in their eyes, he decided to play along.

After school, Haruto arrived at the meeting spot Hemari had chosen—a quiet, high-end café in the city.

The moment he stepped inside, the air smelled of fresh coffee, chocolate, and vanilla.

Takashi was already sitting at a table, sipping a cold drink, smirking like usual.

Satsuki leaned back in her chair, twirling a spoon between her fingers. "I was starting to think you wouldn't come, Haruto-san."

She stood up the moment he entered, walking towards him with a smile.

Haruto smirked. "I didn't have much of a choice, did I?"

Hemari grabbed his wrist and pulled him towards the table. "Sit. You're going to enjoy today whether you like it or not."

For the first time in a while, they acted like normal students.

Takashi kept teasing Satsuki. "I bet you planned this whole thing just to sit next to Haruto."

Satsuki rolled her eyes but didn't deny it.

Hemari and Haruto had their own small silent war.

She kept trying to make him drink something sweet.

"Try this, Haruto. It's really good." She pushed a caramel frappuccino toward him.

Haruto stared at it with mild disgust. "I don't do sweet things."

He sighed, took a small sip—only for his expression to immediately darken.

After leaving the café, Satsuki dragged them to a mall.

"Come on! If we're celebrating, we should buy something fun."

Haruto had zero interest in shopping, but the girls had other plans.

Satsuki and Hemari forced him into trying different outfits.

They made him wear a white turtleneck sweater, then a dark blue blazer, and even a casual streetwear look.

Satsuki's eyes sparkled. "He looks good in anything…"

Takashi laughed. "I don't know what's more dangerous—Haruto's strength or his looks."

Haruto had always been handsome, but seeing him trying on different styles made her stomach feel weird.

"You're staring too much." Haruto said flatly.

Hemari looked away, flustered. "Shut up."

As the sun set, they ended up at a small amusement park.

Takashi went off to play games, while Satsuki and Hemari somehow convinced Haruto to ride the Ferris wheel.

As they reached the top, the city lights below them, Hemari suddenly whispered—

"Because…" she hesitated. "I don't want you to disappear one day."

For a second, Haruto didn't answer.

Then he smirked. "I'm not going anywhere. At least, not yet."

Hemari reached out and held his hand.

As they walked home, Satsuki suddenly stopped and turned to Haruto.

"Tomorrow, we'll make your birthday unforgettable."

Takashi nodded. "It'll be the last birthday you have as a normal student."

Haruto simply chuckled. "I doubt it will be normal."

Hemari grabbed his arm. "Still… I hope you'll like it."

As they walked together under the night sky, none of them knew—

End of Chapter 25 – A Day of Happiness