[Gouda Nagi] My little sister is the sun. (2D Comic Magazine Kinshin Yuri Ecchi Vol. 1) [SquigglesJP]

When her father remarries, the dark-haired Rui gains a relentlessly cheerful new step-sister in Miu—and greets her with a flat declaration of 'I hate Miu' from the very first meeting. But spotting the girl crying alone at a rainy bus stop cracks Rui's cold facade, sending her sprinting after Miu to grab her wrist before she can disappear. The tearful confrontation melts into a breathless sixty-nine between the two schoolgirls, uniforms pushed aside as they moan through climax after climax, finally choosing to feel good together instead of apart.