Extra: The Smartest Kid Championship
Manga 30ex2
Release Date: Jan 13, 2010
Arc: Chaos Arc
Chapter: Extra
Volume: 07
Chapter Guide
Extra: The North Wind and the Sun
Second-Generation Angeloid

Extra: The Smartest Kid Championship is a Extra chapter of Sora no Otoshimono manga.

Basically a chapter about Astraea and Tomoki having random contests to find out who, between the two of them, is actually the dumbest in Sorami. This came after the challenge that he along with Sohara, Mikako, Astraea, and Nymph participated in at their school.

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