If somebody on the team gives everyone else a kiss in jersey order then it gives you all good luck for the game that’s LITERALLY just science. (They’re on a rota, Oikawa just had the misfortune of witnessing Suga’s turn first. It’s most people’s favourite, for heterosexual reasons.)
[ID: First, a short sketchy comic of Haikyuu!! characters. Suga calls out ‘Okay, line up!’ to his team, causing Oikawa to look up and watch him suspiciously, thinking ‘What are you up to, Refreshing-kun?’. In the next panel, Suga holds a cheerful thumbs-up to the camera, with the words ‘Sugawara-san’s GOOD LUCK KISSES’ behind him. Oikawa, visibly outraged, yells ‘WHAT!?’. This is followed by monochrome sketches of Suga kissing each of his teammates in turn, in numerical order of their jerseys. The drawings are simple, without noses, and feature many different kisses on lips, cheeks, foreheads and hands, with pink added to characters cheeks and in hearts around them. Almost everyone is blushing and smiling. End ID]