Suou and Erika yuri scene?!

Whoa, yuri scene between two main heroines Suou and Erika? I mean, I know it's just some small skinship between friends, but the scene is so surprising that it made me jump from my seat when the CG appeared.
Erika helped Suou with her search (related to the main plot) and was like, with her usual mocking joking tone, "if you really want to thank me, let me use those thighs". Suou answered confused "what?" and Erika doubled down with a "Lap pillow! Let me!" leading to a surprising Suou saying "Sure, here you go".
That left Erika completely speechless as she wasn't expecting Suou to actually agree to give a lap pillow.
Plus now they're basically flirting with Suou going "you're so beautiful" to Erika. I know that I wear my yuri-tinted glasses often, but this is so blatant that it must not be just me!
Apparently it's the first time Suou gave a lap pillow to anyone (she didn't do it to Mayuri), but she got it multiple times done from her grandfather.