My Sister Pretended to Have Amnesia, Then Regretted It

My two older sisters lost their memories in a car accident. They forgot about me and treated the son of my parents’ friend as their own little brother. My eldest sister gave him the assets our parents had left me. My second sister used her influence to let him take my place in a graduate research program. I thought they’d really forgotten me. Until one day, I accidentally overheard my eldest sister say to my second sister, “Pretending to have amnesia is exhausting. How about we just kick Rong Ruinian out? Then we won’t have to keep pretending.” They didn’t need to kick me out. I left on my own and joined a twenty-year closed medical research program. For those twenty years, I couldn’t contact the outside world or go home. When my two sisters found out, they wept in utter despair.