These type of MCs are so fucking annoying.
Sure sure, your fucking virgin brain couldn't comprehend how a pretty would want to talk you. But you can still at least talk and act like normal classmate, right? The girl was just trying to have normal fucking conversation, what the fuck are you...
That's weird, If she really a Samurai of Western Army then there is no way she don't know what a church is. Kyushu is full of those, not to mention all the Christan samurai that fought on two side.