Hidden blue, pale white

The story begins when Natsuno, a boy joining the high school's art program, is forced to stay at the home of Mashiro, due to family circumstances. When he sees her sketchbook from middle school, he tells her, “Don’t bother talking to me unless the house is on fire or someone’s dead.” Mashiro decides he’s impolite and annoying and tries to kick him out, but… (Source: Natalie, translated)