Help me find this yaoi

So it's about black haired glasses uke who is inlove with this guy(not sure if they were classmate). First meet when the uke was having a heat stroke in a train station, the seme gives a handkerchief to the uke. Then they met again but the seme has forgotten it. They had a club (badminton?) The uke had a heatstroke and was carried by the seme. In the clinic room, the seme gave his jacket to the uke. Which the uke mastubte in the clinic. The seme saw it lol. The blackmailing begins and seme is falling inlove