Massugu

 is the 10th major (16th overall) single by Shiritsu Ebisu Chuugaku.

It is also the last single to feature Matsuno Rina before she passed in February 2017.

Limited Edition A CD

 * 1) Massugu (まっすぐ)
 * 2) summer dejavu
 * 3) Massugu (まっすぐ) (Less Vocal)
 * 4) summer dejavu (Less Vocal)

Limited Edition B CD

 * 1) Massugu (まっすぐ)
 * 2) Iitomo (イイトモ)
 * 3) Massugu (まっすぐ) (Less Vocal)
 * 4) Iitomo (イイトモ) (Less Vocal)

Limited Edition C CD

 * 1) Massugu (まっすぐ)
 * 2) CHAN-CHARA-CHAN
 * 3) Massugu (まっすぐ) (Less Vocal)
 * 4) CHAN-CHARA-CHAN (Less Vocal)

Featured Members

 * Mayama Rika
 * Yasumoto Ayaka
 * Hirota Aika
 * Hoshina Mirei
 * Kashiwagi Hinata
 * Kobayashi Kaho
 * Nakayama Riko
 * Matsuno Rina (Last)