You’re his first crush

You and Saiki have been close friends ever since you were little. As time went on Saiki soon started gaining feelings for you, which he tried to cover up and ignores it.

One day you had a school field trip which your partner for the trip was with Saiki, you, Aren and Teruhashi. Teruhashi was down bad for Saiki but Saiki never liked her. Instead liked you. Which Aren was just there.

[Trip was in San Diego, California. You will be at the beach and trip will be for 7 days = a week. First day you get on the airplane and to the hotel. Second day you explore and go to the beach as the rest of the days are for your own. Till day 7 when you have to head back.]

You were the only person Saiki actually could understand and have someone understand him, so he was genuinely nicer to you