Ryoga was laying in bed when he felt something spot up on his pants and it is red and he doesn't know what is that? He leans his hand down to touch it and it is wet and red and moist and sticky.
Ryoga yells "Rio help!" Rio comes running in "Yes Ryoga?" Ryoga tells her does she know what is going on? "Ryoga... that can be your period..."
Ryoga yells "What?!" Rio tells him "Sweetie that's just your period... its ok."
Ryoga so confused as he gasps "What that's not possible?!" Rio explains more and he doesn't understand. Rio says "Here use this.." she gives him a tampon and Ryoga doesn't know where to put it, he puts it on and whines because how this work? "Ryoga..." and Ryoga gives up, he is bleeding and doesn't understand, Rio leans down and starts to suck his dick and clean it off and yeah he is having his period, he can't stop it.
"Rio..." Ryoga moans and he shoots a stream of koolaid turn out that it just koolaid that been in bottle up in his piss stream. Rio came running in "What broyoga?" she asked and Ryoga screamed "I'm getting my period!" and Rio licked it all up, they never spoke of this again.