Yuzu Aihara is an easy going girl who finds her dyed blonde hair and dress sense aren't appreciated at her new school; particularly by student council president Mei Aihara. Yuzu has changed schools because her mother has remarried; she gets quite a shock when she learns that Mei is her new step-sister! To make matters worse they have to share a room. Yuzi is further shocked when Mei kisses her; she says it was just to shut her up but soon Yuzi realises she is starting to develop feelings for Mei. As the series progresses it frequently looks as if they will get together as a couple then complications arise.
This series is rather sweet; the lead characters are suitably different which creates some tension and makes one wonder how it will all work out... it isn't until the final episode that we learn if they will become a couple. The way Yuzi is tentative about telling Mei how she feels about her is very believable; she hasn't been in a relationship before and certainly never thought she might be attracted to a girl. The series manages to avoid excessive fan service; it is about their potential budding romance not what they may ultimately get up to. The character designs are good and the animation is impressive. Overall this is a charming example of the genre with enough drama and likeable protagonists; I hope there is a second series.
These comments are based on watching the series in Japanese with English subtitles.