第1章 贫民窟里的温柔，签到系统

Tenderness in the slums, sign-in system

(No female lead) (Introduction is weak, please read the main text)
Beichuan accidentally traveled to the world of Prince of Tennis and became an orphan in a church in the slums.
On the last day of his 11th year, the energy conversion was completed, the sign-in system was activated, and he gained ultimate tennis talent.
At the age of 12, he chose to go to Rikkai University Affiliated Middle School and participated in the Free Country Youth Tennis Tournament.
As a result, Echizen Ryoma became Ox-Horse Little Echizen, and Echizen Ryoma became Echizen Molar.

（无女主）（简介无力,请看正文）
　　北川意外降维穿越到网王世界，成为了贫民窟教堂里的一名孤儿。
　　11岁的最后一天能量转换完毕，激活签到系统，获得了至臻级网球天赋。
　　12岁选择去立海大附属中学上学，顺便参加了自由国青少年网球大赛。
　　结果，越前龙马成了牛马小越越，越前龙雅成了越前磨牙。
　　......