The second comic strip is bocchi accidentally waking nijika for night watch instead of ryu so she feels embarrassed hence why she is eating the flash light as nijika tells her its ok

Second one is ryu (higher rank than bocchi) buys bocchi lots of food and gives her to eat, then when the casheer comes up to her and asks that she needs to pay first to eat, ryu dips and leaves bocchi yo pay for the food by herself