After Pursuing Shizun as My Wife, How Did I End Up the Bottom?

Chapter 0 After transmigrating into a Green River novel as a disciple, I immediately started pursuing Shizun like he was my wife. Every day, I dreamed of only three things: being a dog, sucking on tits, and going to elementary school. The System dumped cold water on me at once: [Stop, stop, stop. No one said you transmigrated here as the top.] I treated its words like a fart. “Like I need you to tell me? You think I haven’t read these novels before?” “Out of ten Shizuns, nine are bottoms and one is a switch. That is the eternal truth of the master-disciple genre.” “What’s the point of being the disciple if you’re not the top?” “Shizun is the wife Heaven bestowed upon me!” System: [Aight.] I grew even more confident, clutching my little mushroom as I waited day and night. At long last, Shizun was afflicted with an aphrodisiac poison. I immediately pounced on him, unable to wait another second. [Shizun, let this disciple sacrifice his body for the Dao and help you purge the poison!] The beauty hesitated for a long while, but in the end, my excitement toppled him over. Three days later, I clutched my swollen belly and scrambled for the door, practically sobbing. Goddammit, where exactly did things go wrong? The System smiled and offered a little educational tidbit: [May I introduce you to the Shizun top? Thank you.]