"Massugu" (まっすぐ) is the 10th major-label single by the Japanese girl idol group Shiritsu Ebisu Chugaku.
It was released in Japan on September 21, 2016, on the label SME Records.
This is the last single featuring Rina Matsuno, who died on February 8, 2017.
According to Oricon, in its first week of release the physical CD single sold 14,446 copies.
It debuted at number 7 in the Oricon weekly singles chart.