Please Don't Call Me Yagyu's Little Sister

A woman well past her youth somehow transmigrates into the little sister of Yagyu Hiroshi: Yagyu Gappo. All she wants is a carefree life: a little money, a nice car, and a house facing the sea. She doesn't want to be anyone's pawn. She likes being in control of her own life. She loves her family, especially her brother, who's a total siscon, but hates it when people call her Yagyu's little sister. She gets especially happy when people call Yagyu Hiroshi "Brother Yagyu." She: You're a magnificent narcissistic flower. You look pretty good. Atobe: Hmph. This king is always the most magnificent. She: If you can keep looking good, I'll consider making you my boyfriend. Atobe: Furious. Isn't that my line? She: Hehe, you're just too embarrassed to confess, right? Atobe: Hmph. Yagyu Gappo, be my girlfriend. She: Atobe, I was joking. I'm just practicing how to confess to my boyfriend someday. Pretty impressive, right? Atobe: Fuming. He thinks, When has this king ever gone back on his word? Just wait for my magnificent pursuit! Yukimura: Gappo, come be the tennis club's manager. She: Manager? That's a pretty high position, and the pay sounds decent. So what's the annual salary? Yukimura: Annual salary? His mouth twitches, then he turns to stone. Yanagi: Opens his eyes. The pen in his hand falls. Fuji: Tezuka, that girl looks pretty nice. She's interesting. Tezuka: Glances over. Is that Yagyu Gappo? Her kendo is good. Yes, she's quite good. Inui: Good data. Tezuka actually praised a girl. There's an 80% chance he knows her and a 60% chance he likes her. Tezuka: Turns on the full blast of his icy aura. Fuji, Inui, run twenty laps around the field. Inui: There's a 100% chance Tezuka is angry and a 30% chance he's embarrassed. Good data, good data. Fuji: Hehe, how interesting. Thank you all for your support! This story will become a paid work on June 20, 2011. Cast: Yagyu Gappo, Atobe Keigo. Supporting cast: Yagyu Hiroshi, Rikkai, Hyotei, Seigaku, and others. Premise: