Print out and laminate the profile cards, and have a PC ready to show them the tutorial.
First, practice the vocabulary go through the vocabulary when referring to pronouns - he, she, him and her. Any introductory material that your JTE has at the beginning of the lesson will be useful here.
Then, show them the tutorial powerpoint about how the game works.
The students each receive 1-2 cards, and must study their likes and super likes and walk around the classroom looking for a match. As they find another student, they must ask:
"Who do you have?"
"I have Mikasa!"
"Oh! I have Eren!"
"Does she like him?"
"Yes she does!"
"Does he like her?"
"Yes he does!"
"It's a match!"
Then, they match cards together, indicating a point or a win. They can rest or walk around and find out which other characters match! If they have more than one character, they can continue playing. If they have two characters that already match at the start of the game, they may not pair them together.
Someone had a lot of fun making this!
Now this is style. Well done!
Did your students ask what Tinder was?
I like the idea but I wouldn't be introducing "Tinder" at this point, I especially wouldn't be showing ages to pair a "14" year old with anybody over 18, Japan already has enough problems regarding "that suject". :)