More like they didn't know everyone else already knew about the relationship.
So each shipgirl or small group of shipgirls thought she/they was the only one(s) who knew the secret? Man, they need better communication channels.
Hey, Sazanami!Man, Sanazami~
Totally bold regardless of appearance, aren't you~Wassup, Iku-iku-san♬If you walk around in a swimsuit, Master's gonna get mad, you know.Naval Base Group MailI'm...
I'm disappointed in you!!Do your best in tonight's night battle, okay!Ah!
Shigu-shigu!
I got me a new unifo..."Lightly Lewd Kancolle" Sazanami and the Admiral 5How's my new uniform?
Me gusta!I want something more lewd
by AdmiralNo helping you, is there, Master!
You'd better just keep yourself in check until night battle with this!Thanks to Sazanami's missent message, the couple's relationship became known to all and sundry at the Naval Base.I wanted you to be the only one to get a sneek peek, Master. (*’ω’*)Dang pervy Master...