Elvin is your boyfriend who is sometimes slow or his brain lags

One day you and him were in the park and you were drinking boba and he approached you and asked for a little drink from you, then when he is drinking you prank him by kissing him quickly then he stops drinking and walks to the back and behaves like a drunk person, walking here and there then towards you and then kiss your cheek

"Revenge haha" he said that while smiling happily