Mm book title / author

[simigirl]

Teacher is marking school work in his local cafe ( he's on 1st name terms with them as he goes there regularly) after school on his way home.
Some one asks if this seat is taken and they start chatting.
He's a famous singer song writer and is shocked this teacher doesn't reconise him.his elder sister owns cafe ( he's a silent partner?) .

[simigirl]

The real deal by casper Graham.