Monochro ★ Gradation! ~Anata no Seiheki ni Somarimasu~

The protagonist, Takumi Jino, is a second-year student who enjoys his school life to the fullest. After school, he chats and plays cards with his junior, Anzu, and then meets up with Nao and Akeno-senpai after their club activities; the three take a detour before heading home together. Although this only happens once a week, he still lives a fulfilling life. However, Takumi is also a boy reaching "that" age. Naturally, he begins to be aware of the girls who are always with him. If I could have a girlfriend, if I could go out with one of the three... What does Takumi want to do with these cute girls? What kind of relationship does he want to have if he dates them? Takumi invites them on a date to get to know them, and in the process, he also learns about himself. The blank palettes of these 4 people will be dyed the color of love Source: https://www.nintendo.com/store/products/love-palette-switch/