Why Is My Little Brother Like That?

Gentle older sister x possessive younger brother | 1v1, both leads are each other's first love | Happy ending | Foster-family trope

You grew up in a single-parent family. You never knew your father, and your mother favored someone else. The only person who treated you well was Zhou Xia, who had been fostered in your home since childhood and cared for you in every way.

As you both grew older, your sister became more and more beautiful. She was gentle, excelled at school, and had plenty of admirers.

In response, you decide to...

A: Carefully vet your sister's suitors and protect her from scumbags

You beat up your sister's crush. When Zhou Xia comes to bail you out, eyes red, you brazenly ask the classic question: "Who do you favor more, me or him?"

Zhou Xia is silent for a moment. "...You."

Your meddling ruins things between them. Just as you're secretly celebrating, you find a pile of love letters in your sister's schoolbag. After carefully studying them, you can't help getting annoyed...

Why are there letters from both boys and girls?

B: Show your sister by example what a good boyfriend should be, and keep her away from lousy guys

You eagerly help your sister with the laundry and cooking every day, hoping to raise her standards. But you discover that she's still entangled with her ex. Burning with jealousy, you decide to do something against her wishes.

During the holidays, Zhou Xia stares at the empty laundry tub and asks, "Xiao Yan, have you seen my clothes?"

Recalling how soft they felt in your hands, you answer guiltily, "No."

C: Work hard to earn money and provide your sister with a comfortable life, covering all her needs

Because of changes in your family, you leave home and begin spending much less time with your sister. You can tell she feels more protective of you and closer to you than before. You figure that if you stay apart long enough, maybe you can trigger a rekindled-love storyline.

Heaven soon grants your wish. After two years apart, when you finally return to your sister, you see sadness in her eyes.

"You remind me of someone."

What is this, a replacement romance?!

After going through countless trials, you finally complete all the options and unlock the achievement: Won Your Sister's Heart.

You thought the progress bar toward a happy ending was already at 99%, but during an intimate moment, your sister calmly tells you, "I'm getting married."

Your smile stiffens. "To me?"

"No. Don't forget to come."

Reading Guide:

1v1, both leads are each other's first love

The female lead was fostered in the male lead's home. They are not registered under the same household.

The story is set in an earlier era. Please don't overthink the details.

No intimacy before adulthood.

Theme: Love yourself well