You opened a pixel-art dating sim said to be easygoing, with no grinding or spending required.
The game was set at a school and had lots of potential love interests. Your unusual constitution didn't seem to affect any of them, which reassured you. That meant nobody would be fixated on killing you.
The silver badminton-shuttlecock block was happy to take you in. He acted spoiled around you and rescued you from a fanatical admirer. He said you seemed strangely familiar.
Your pink-block classmate greeted you without fail every day, warmly and kindly offering you milk and bread.
The hedgehog-haired block looked cold and hard to approach, but he was actually sweet beneath his gruff exterior. He also had the constitution of a Disney princess, able to summon all sorts of little animals.
After that, you even met a translucent block who could control jellyfish, a cult-leader block who always smiled gently at you, and a mysterious blue block who claimed to be your senior and kept trying to take you home...
As time passed, everyone's resolution got higher and higher. You knew it was proof they liked you, and it made you happy.
But then things started getting strange.
You found a bloody love letter in your locker.
In a locked room, you saw cursed tools meant to imprison you.
In one block's room, you found your own photos covering every inch of the walls, taken from all sorts of angles.
A block with sutures holding severed limbs together, who claimed to be your mother, pulled you into an embrace and asked whether you liked Daddy or Mommy more.
They all seemed to have an extra memory that you didn't. Unlike your brother, who wanted to kill you, they loved you in their own ways.
And you were just an ordinary person with the same constitution as your brother, unable to come back to life if you were killed.
How to enjoy this story:
1. You want a lover who loves you deeply. Just one, though.
2. You'll take a relationship seriously. But there will only be one.
3. ...
n. Under no circumstances can your brother find out about any of this. You'll die. Definitely.
(The heroine has a Tomie-like constitution, and her brother is a gender-swapped Tomie. The male lead is the first one to appear.)
Theme: Sharing the same blood doesn't necessarily mean it's love
