...'s manga / #Nanameguri(4)

chapter 1 - an promiscuous astronomy club member met an alumni who have a crush to the club adviser but unable to confess, the guy fall in love for the first time but was already unrequited towards the alumni. Now the adviser who was about go to a matchmaking but also discovered to have feelings for his former student, the guy just do something so that the alumni will able to confess his feelings.