Tennis Set in a Mafia World

Complete and ready to read. Check out my completed story next door, "Rikkai, but Tennis RPG Simulator," and my new story, "The Strategist's Cursed-Sorcerer Little Brother Also Plays Tennis." Blurb: In his previous life, Yukishiro Kuritsu was an outside adviser to the Vongola family. In his second life, he not only lost his memories but also got bound to a raising System. His dream was still to join the Vongola, but instead he became a regular on Rikkai's team. Something about this feels wrong. [Welcome, Host, to the System space. With the System's help, please become the world's number one--bzzzt, connection failed. Please reconnect.] After the inexplicable System brought him to an inexplicable space, it vanished. Looking at the various melee and ranged weapons inside the System space, Yukishiro Kuritsu clenched his left hand into a fist and smacked it into his right palm. He got it! His goal was to become the world's number one Mafia! [Bzzzt--connection successful. System is online. Assigning Host identity and preparing to deploy Host.] After who knew how many years in the System space, Yukishiro Kuritsu looked at his status screen. [Name: Yukishiro Kuritsu. Level: 99. Skills: Max-Level Swordsmanship, Max-Level Marksmanship, Max-Level...] His long list of max-level skills convinced Yukishiro Kuritsu that if he could just outlive that incredibly charismatic baby with the sideburns, he'd become the world's number one hitman. But then-- Yukishiro Kuritsu found himself standing in front of Rikkai University Junior High. [Please become the world's number one tennis player.] Hey, little question marks, got a lot of friends? * My ongoing story next door, "Rikkai, but Tennis RPG Simulator" [Loading... Loading... Tennis Simulator starting.] It's a pixel-art RPG, but nobody said the game would show up in real life! Seriously! Shiratori Momo of the Vongola family looked cool and composed on the outside, but was screaming like a groundhog on the inside! * [Congratulations, Player, on the achievement: Maxed-Out Data Master. Max out your stats and you can do whatever you want.] [Loading... Loading the massive U17 World Cup dungeon.] [You and your teammate Byodoin Phoenix have died.] #Is there something wrong with getting struck by lightning while playing tennis with maxed-out stats? #Is there something wrong with your teammate getting struck by lightning while playing tennis too? Second run, starting over with Rikkai as her new team. The path to mastering tennis: X The path to tormenting players: O Shiratori Momo: Gotcha.JPG Rikkai: So... Why can this short pink-haired gremlin, with a tiny health bar, step on air and destroy this world from time to time? And why did this pink-haired gremlin arrive in a tank? Wait, a tank is one thing, but an Osprey helicopter too? Rikkai: We even got to experience Mafia training :-D So there really is a Mafia member here! #This player's health bar is paper-thin, but she's ridiculously powerful. #Not a psychopath, a player! #Actually, she's Mafia! Content warnings: 1. Mary Sue, golden finger. 2. Rikkai's 16+3, negative portrayal of the Seigaku coach and Fudomine's Tachibana An. 3. The swords are just background dressing. Kuritsu's Rain Ring isn't one of the Seven3, it's a System reward from his golden finger. Theme: Creating our glory on the tennis court.