Artist's commentary
#GuPOneHourMidnightBattle
#GuPOneHourMidnightBattle_20180701
#NishizumiMahoBirthday2018
Topic: "Swimsuit", with Maho-oneechan slightly tanned.
Happy Birthday, Maho-oneechan!
Source: https://twitter.com/FLIPPER_SN/status/1013407802713227264