So this scene takes place in a hot spring where Shigure is taking a bath late night and she brought a friend with her for some fun.
First Panel: Yuta is going down on Shigure doggy style in the hot spring. The water is splashing all around them as Yuta goes hard inside Shigure.
Second Panel: Shigure is down on herself moaning in pleasure scratching the grass surface as Yuta relentlessly pounds her.
Final Panel: Yuta has almost reached his limit so he grabs Shigure by her breasts with a strong squeeze as he releases all his cum inside Shigure. Shigure in turn moans in pleasure as she welcomes Yuta hot sticky cum inside her.
PS. Make sure that there bodies have drops of water all around there bodies. This is a hot spring after all so it makes since that they're all wet.