Warui Ko No Tame No Wasuremono Techou
Other titles :
Fundbüro der Liebe, Love and Removed Thing Left Behind, The Bad Boy's Notebook of Forgotten Things, 悪い子のためのわすれもの手帖
Author(s) :KINUTA Nana
Story 1 - Sano tends to forget some things - a wallet, a pen. Little things. There are also things he doesn't forget - like making sure Ashihara is around to remind him when he "forgets" something. It's not deliberate. Really.