The school year starts in April. If you're born before April 1 you enter 1st grade at six otherwise you have to wait until you're almost 7. So she's making the excuse for other people not knowing her birthday that April is a hectic month. Something like that. It is implied that she has no issues remembering others' April birthdays. While she's sociable, both her and the baby sloth are actually a bit lonely. She gives more than she gets.
On edit: I love how they both go to sleep in their street clothes. I lived in a cold part of Japan, and that's truth in manga.
last edited at May 20, 2016 4:26PM