I looked only "Well my little sister can't be such darling". A relationship reveals wholly, but a tsunder nevertheless not my type.
Couple is loved - it is Soar and Shiro, the brother and the sister, the onanist and лоля from "Aren't present a game there is no life". But they have not romantic relationship.
From younger sisters besides Shiro still to be pleasant Sagiri from "to Eromanga the sensei", but there the brother and the sister summary.
