I'm going to guess this is sanya_v_litvyak and tatsuta_(kantai_collection).

ROMaster2, you're correct.

The image is a fan art of this Yaruo-themed online novel: 絶初期ステ詐欺のやる夫が頑張るようです

There's an ascii art version of post #1702582: http://yaruokei.blog.fc2.com/blog-entry-9092.html