A Certain Magical Index SS, Vol. 1 (light novel) - Kazuma Kamachi, Kiyotaka Haimura

A certain unlikely hero...Only Komoe''s class would let a regular conversation spiral out of control into a grand-scale hot pot party. It''s an open question whether her students are a blessing or a curse. Meanwhile in London, the English Puritan Church''s facilities should generally be a place of prayer and quiet contemplation...So who''s going to take responsibility for the chaos unfolding in the sisters'' dorms?! Back in Academy City, a certain railgun''s mother has suddenly popped in for a visit, which is more than enough to make even a Level Five esper panic!