サインブックだったら
saimbukkudattara
1. If/when it's a sign book.; If/when it were a sign book.
Noun
#380021
1. If/when it's a sign book.; If/when it were a sign book.
1. if it's the case
1. sine
1. autograph; signature
2. sign; signal
1. neon (Ne)
2. neon sign
1. book
1. peace
2. peace sign; V sign
1. signing; autograph session
1. Board of Audit
1. green light; (giving) permission