Oh dear, I feel sorry for her mom to lose your kid like that must be horrible cause you'll never know what happened to them. I never thought about all the people left behind when the protagonist goes to another world. Must be sad for them.
No good deed goes unpunished, as they say. Try to help some grubby old lady who's dropping her fruit all over the place, get kidnapped by monsters. Just another day in the life of a good samaritan.
I enjoyed the translation note at the end. Knowing about Korean culture makes it much easier to understand the context behind the scenes. This manga looks great!