How Could I, as the Eldest Sister, Like Two Younger Brothers [Shi Jiyuan]

[Keywords for demining: American group sandwich/sister-brother romance/OOC] Summary of the key points: I want to write a plot where Stan fights and fights, and I want to see two extremely rational people arguing over love! ! I write what I like to read, and you guys can sort out the mines on your own. Thank you! I really don't want to engage in petrification this time/write some elementary school plot (? Intention:.