A Certain Series

A mysterious man takes Index. Source: Episode 1

He was so close to her face. Source: Episode 1

This is why he took Index. Source: Episode 1

He kind of looks like Touma but older. Source: Episode 3

A tall and short nun. Source: Episode 3

Touma was willing to take on all the nuns in order to save her. Fortunately, backup arrived. Source: Episode 4

Those are no ordinary nuns. Source: Episode 4

She is one crazy nun. Source: Episode 5

I guess Kanzaki is also a tsundere. Source: Episode 5

He looks away from her for a second and she goes ahead and bites him on the head. Source: Episode 6