k-on!
tainaka ritsu, tainaka satoshi
abubu
1boy, 1girl, age difference, brother and sister, brown hair, groping, hetero, incest, nervous, onee-shota, panties, pantyshot, sakuragaoka high school uniform, school uniform, short hair, shota, siblings, underwear, upskirt, white panties, yellow eyes
commentary, commentary request, translated