Likely a fan-made work (doujin) involving the "NTR" (Netorare) trope or the characters Narita Top Road and Rice Shower.
The narrative follows a classic, albeit accelerated, NTR structure. It focuses on a protagonist who is in a relationship with a childhood friend. The story begins with the protagonist suffering an injury (often depicted as a broken leg or arm), which renders him immobile and dependent on his partner for care. NTR rice -Final- -Halasto-