Not harem this is like my ex lover is my step sibling manga.

Story is about two highschooler drinking at cafe after school ended. They were couple, the female high schooler tell the male high schooler who was her boyfriend : " let's break up, we have been dating for few months and i think we are not suited at each other, better we be friend again and act normally at school"

The male high schooler then say " sure, you are right, i also feels the same way, let's be normal friend again"

Both then left the cafe and say goodbye.... next day they meet again...well they are childhood friend and their house was beside each other aka neighbour.

They often meet each other and interacted with each other to the point their family and friend think their break up is a joke because they still act close like when they are still dating.

This is 2020 manga , each chapter were short, around 5 or 7 pages.

Maji de Tsukiau 15-pun mae?

~4400 manga completed
~1700 ongoing...

Quote from Aremon

Maji de Tsukiau 15-pun mae?

yep thank you very much , i have been looking for it thanks a lot