Are you translating this and asking us for a translation so you can compare or?
When I looked like I was serious, my sister came back and shocked me by saying "Your bed is on the verge of falling apart." As I looked at her with a mix of doubt and suspicion, she turned and added "Mom was saying we should get rid of it and put my piano there instead." "Ah..." I could feel a line running across my face and hear Keaton Ideta's narration (uh?). "And just like that, the worthless room Maruko had finally made for himself was replaced by his sister's piano and consigned to oblivion". I then heard a loud bell ringing throughout. Using these recollections, I completed my comic.
Even my previously meaningless memories are now of use. I would ask the people who feel their day-to-day life is meaningless to hang on, as there may come a day where it can serve them.
-「径」≠「役に立つ」
-I am not sure the tenses in my translation are correct or if I even get what's going on.
-Keaton Ideta??
-日々虚しさ "day-to-day meaninglessness" I reworded this and other stuff, but hopefully it's close enough.