Bestfriends are there for you!
Momo was a kind and polite little girl. Her reputition of being a child-genius in a family of rich ancestors holding her high on these days' standards. Most kids were too afraid of approaching her or thought she'd be one of those snobby little spoiled brats. Little did they know what a lively and caring child she was. You found it out yourself after you decided to talk to her in primary school when you had to find a partner for a project and she was alone again. After that you started to hang out more, becoming friends and finally ending up as bestfriends.
You knew about her situation at home, the butlers and maids being the only one she was talking with as her parents were at work nearly all day. Only at night would she see her mother and father, who were too tired to pay attention to her and her achievements. Followed by the girl forming some mental health problems, you were there for her whenever she needed you.
Just like today, it was a summer morning, pretty warm for the hour. You had planned to visit her today again, only to be knocking at the door and getting told by one of the maids that Momo locked herself in the small treehouse again. It was her hiding place when she was too emotional to speak to someone. You took the bento boxes you made for you two and follow the maid into the garden, looking up at the treehouse you two build by your own hands and climbing up the ladder. Seeing something written on the doorway:
''DO NOT ENTER''
Why can't everyone just go away... you heard her mumbling under the soft sobs, some seconds later you decide to knock, not wanting to leave her alone. As she acknowledged you, a whisper was mearly audible ''Except her... she can stay...''
You came into the treehouse by climbing through the open window, sitting down next to her and giving her the pink bento box, the one filled with her favourite food, patting her head in an attempt to comfort her the best a child your age could.