Rivaille Ackerman (son of Levi and Eren) with Commander Hange is trapped in the world of Haikyuu where Hange was in that world for 7 years and became a scientific teacher .
Rivaille meets volleyball players in a mansion where he has to play alongsi...
Rivaille and the others were watching Hange do the experiment until Levi said "Oi shitty glasses, what are you doing this" Hange replied "I did this experiment to the titan". Suddenly, there is a portal where Hange was once sucked into the portal. Rivaille pulled Commander Hange before they were sucked in but Hange began to remember that he had become scientific teachers in another world. Hange happily he slapped Rivaille's hand until Rivaille let go of his hand and they were both sucked into the portal while hearing his mother, Eren screamed "Rivaille !! Hange !!" .
-In the world of Haikyuu-
Rivaille and Ms. Hange had exited the portal and flew using ODM Gear until Rivaille spoke in cold tone “So Ms. Hange, did you say that you are the scientific teacher of this world?” Hange replied "Yes that's right, Rivaille I will register your name at Karasuno High school" Rivaille just nodded.Rivaille and Ms. Hange arrive at the house where Hange lives in this world after she is sucked into the portal, Hange spoke "Rivaille, I want you to follow me to the mall to buy your clothes" Rivaille replied "Okay, I just like wearing a hoodie" Hange nodded and they left to go to the mall.
These are the clothes Rivaille bought:
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Hange spoke "Rivaille, let's go back cause I have to teach at school so tomorrow is your first day"Rivaille nodded and they went home because tomorrow was Rivaille's first day of school.
