Seikaisuru Kado: Aoi Haru to Railgun
正解するカド : 青い春とレールガン · せいかいする かど : あおい はる と れーるがん
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
The manga takes place immediately after the end of episode five of the anime series, and tells another story not told in the anime. The manga follows high school students whose lives are completely changed after the arrival of the Kado cube and the unlimited energy source Wam. (Source: Anime News Network)
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections