Does anyone know what manga this is?

That's definitely by panpanya. I'm not sure which work it is in particular.

http://www.mangaupdates.com/authors.html?id=24478

File: tumblr_nhycj2b4El1tu9g5eo1_1280.png (1B, 486x500px)

1B, 486x500px

More stuff by panpanya with character art like in your pic.

Huh, facial expressions look really similar to this

http://bato.to/comic/_/comics/the-private-report-on-my-lesbian-experience-with-loneliness-r19652

but I highly doubt the author would make her personal work's style so similar to her mainstream stuff when she even created a separate pixiv for it

>>210650
Why is this so fun to read? It has literally no substance. Why does my heart grow warm from this??

File: 1416640840446.jpg (6KB, 239x239px) Image search: [Google]

6KB, 239x239px

>>210235
>>210641
I wasn't expecting to wake up to all of this, thanks a lot, Anon.

File: tumblr_n8ms2p5e9L1tu9g5eo2_1280.png (229KB, 654x1099px) Image search: [Google]

229KB, 654x1099px

>>210676
You were asleep for 22 hours? That's impressive.

File: 1451030098799.jpg (274KB, 756x478px) Image search: [Google]

274KB, 756x478px

>>210680
More like distracted for 10 & then slept for 12-13 hours. I'm still tired though anyways.