That sounds similar to a story I've read from Junji Ito
There no way it could be Junji Ito, the story was way cute to be horror.
OMG LOL then yes, no way it can be Junji ito.
Shoujo Shounen Gakkyuudan, I found it. Thanks You for trying though.
haha, I didn't help at all but I will be sure to also check out the manga!
A manga I read. It was about a elementary girl who was a tomboy. She went to school and like her male classmate older brother who is in highschool. The male classmate was insecure about being short so the older brother stretch his legs every night saying it will make him tall. That’s all I remember.