Kamishiraishi Mone and Moka play a pair of pianist sisters, Kazune and Yuni, in Hitsuji to Hagane no Mori (Forest of Sheep and Steel) which stars Yamazaki Kento as a piano tuner. This is the first time the sisters act together, and they practiced the piano for 3 months prior to filming.
Hitsuji will be released in June 2018.
So Kento has actually acted with Mone-chan before Rikuoh ne! =D