What Happened at the Natsugami Household (夏神家に起きたこと)

The protagonist, after an accident during early childhood, is able to discern lies.
Classmate Momo Natsugami, a delinquent among delinquents whom he comes to realize is full of lies.
The protagonist has realized his best course of action is to keep his head down,
keep his distance, and just try and graduate.
He needs to escape his rough household as soon as possible, after all.
However, despite his skittishness, he still ends up getting wrapped up in a certain incident…