Note: Unofficial relations are excluded if the graph would otherwise be too large.
Lovely x Cation 2011-06-24 ja/zh Pretty x Cation 2014-04-25 ja Same settingLovely x Cation 2 2013-04-26 ja/zh Same seriesPretty x Cation 2 2015-04-24 ja Purely x Cation 2016-04-28 ja Same seriesSame settingNiizuma Lovely x Cation 2017-04-28 ja Same seriesNatural Vacation 2017-12-22 ja Same series