Danbooru-based image board with a specialization in high-quality images.
gokou_tamaki kimono ore_no_imouto_ga_konnani_kawaii_wake_ga_nai suzmeco

Edit | Respond

was not her little sister ? ~
Ruri doesn't have blue eyes, Tamaki does. Plus the hair styles match and the epilogue of the LN features a timeskip Tamaki wearing a kimono.