I Realized I Am the Younger Brother of the Protagonist in a BL Game

Reincarnating from a fujoshi to the younger brother of a BL game MC!! All I wanted was to watch over my older brothers, but I became the main character?! A working-class adult fujoshi reincarnates as the younger brother of the BL game protagonist that I played in my previous life. It's after my elder brother gets together with one of the game capture targets... From watching the "happy ever after" of the "oshi couple", to seeing how the other brokenhearted capture targets bounce back, this position is just too delicious!!! But when I was playing the game, there was no "younger brother"?!!