Su Yu got emotionally wrecked over and over while watching Season 3 of Uma Musume. Then, in the game, after his little princesses suffered a string of training failures, lack of sleep, injuries that wouldn't heal, and bad moods that just wouldn't go away, Su Yu's heart and lungs stopped, and he collapsed. When he woke up, he discovered that he'd arrived at Tracen Academy in the world of Uma Musume with the game System, and had become a trainer.
As he and the horse girls make steady progress toward an undefeated record, the System keeps handing him missions, even sending him into dungeons with the girls!
"Historical Achievement Mission 1: Go with your Teio and help the Teio from the TV world, who has suffered so much, achieve her dream!"
"Hmm, that actually sounds pretty good..."
"Historical Achievement Mission 2: Help Grass Wonder from the TV world find love with Special Week!"
"???"
"Major Alternate-Universe Scenario: Travel to 1994 with Tokai Teio and help the champion Tokai Teio change her retirement outcome and win the Tenno Sho Spring and Autumn in succession."
"What kind of ridiculous mission is this?!"
"And to my trainer in another world, Doranako-san, thank you so much! Without you, I might not have achieved my dream. I wish you were my trainer!"
"Don't even think about it, you homewrecker!"
Watching the two Teios from different worlds fight, Su Yu felt the weird distortion getting worse.
1111
Is there more yuri (lesbian) content later? Really? I'm scared.