Stories of the Great Crusch-Sama Opening (クルシュ様偉人伝開幕) is a shop exclusive limited edition short story. This was later adapted and included in the Re:Zero Ootsuka Shinichirou Art Works Re:BOX.
Felix is living his life imprisoned in a room of the mansion of his own family, the Argyles. Suddenly a girl blows up the door and frees a malnourished Felix from his prison, immediately taking him for a bath to wash his very dirty body, she goes on to explain that he was being kept captive due to his parents believe that he was an unwanted child, the result of an affair from one of them, she spoke directly with Hannah Argyle and made sure to use her blessing to detect any lies about her cheating on her husband. Her blessing could not detect any lies from her and soon she would discover that the Argyles had a demi-human ancestor, causing her to make her way to his private quarters and free him.
After the bath she takes Felix to the dining room to eat a decent meal, a place were after so long Felix sees his parents, clouded with anger for the injustice he lived, he grabbed a knife and attempted to stab his mother with it. Due to both Felix's very malnourished built at the time and Crusch attempting to block the knife, Felix stabs Crusch fatally instead (a thing he is horrified at, as she is his saviour). While crying in despair having not wanted to do this, he accidentally heals the young lady and this marks the first healing of Felix Argyle The Blue.