ケンモジサンが少年の頃乗ってた自転車
https://i.pinimg.com/474x/f2/a3/cf/f2a3cfeed428da889fada15e89c601ec--tandem-bicycle.jpg
https://stat.ameba.jp/user_images/20191211/21/gifu-ryutaro/b5/23/j/o0574041714669717029.jpg
https://cdn-ak.f.st-hatena.com/images/fotolife/m/mono93/20170412/20170412132423.jpg