Doukyuusei: Gold Ring & Silver Ring is a 2016 boys love manga series by Nakamura, Asumiko, with 2 chapters. Its catalogue rating is 8.2/10 from 4,070 ratings.
Differences aside, Hikaru Kusakabe and Rihito Sajou's hearts forever dance to the same sweet melody. Given their graduation day vow to eventually marry in the future, the couple come up with the same idea unbeknownst to the other: to gift a matching ring.