Shuukyuu Shoujo - Vol. 2 Ch. 5 - Coaching Boy

[MangaDex]

 

[Hootanic]

Also in the locker with Yuuki: fantasy sword and... pump shotgun? If I remember correctly, Japan's gun laws are pretty restrictive - not like the US where you can go to Cabela's and pick one up (assuming you've got your license to carry or passed you background checks).

Anyways, some interesting equipment for a "Soccer Club"