Memory Seishun no hikari,  or Memory, the light of youth
Arrangement: Maejima Yasuaki

Intro

Eb-7 C#  B Bb7

Theme (Chorus):
Eb-  Ab- (7)  C# (7) F#
Ab-  C#  F#   Eb-
Ab-  C#  Bb (7)

Verse (Rap):
Eb-  Ab- (7)  C# (7)  F#  Bb (7)
Eb-  Ab- (7)  C# (7)  F#  Bb  Eb-

Repeat Verse

Prechorus
(...Sayounara...)
Ab- (7)  C#  F# (M7)  Eb-
(... Sayounara)
Ab- (7)  C#  Cb7  C°7 Bb7

Chorus
Eb-  Ab- (7)  C# (7)  F#
Ab-  C#   F#   Eb-
Ab-  C#   Bb (7)
(Memory...)
Eb-  Ab- (7)  C# (7)  F#
Ab-  C#   F#   Eb-

Ab-  Bb   B  C#

Again rap thing, Repeat half a Verse for this and one complete verse more for singing. 
Prechorus y Chorus.

Intermezzo
Ab- Bb   B  C#
Ab- F#m7  E  C#7  Bb7

Repeat Chorus
Ab-  Bb (7)   B  Bb (7)
Ab-  B  Bb7  B  C#7/Ab  F#m7/Bb


Source: Tanaka Reina's Version.