Yamada-kun to Lv999 no Koi wo Suru - Ch. 88 - Sulking afro is a catastrophe

[MangaDex]

 

[hinatassi]

LMAO eitakun has a point, u shouldn’t be calm for this yamada tho ik akane won’t cheat lolol

 

[mimingsu]

cutie hehe

 

[ViEmlleSzDias]

That’s why you’ve never been there, Akane! LOL

 

[OrionKaelin]

They've done this a few times over the course of the manga; the in-game characters will draw in the dirt to explain something visual.
Seems like an interesting and useful mechanic. Being persistent would be interesting but just as a temporary thing for party members or by invite or request then deleted after exiting would be nice.