User blog comment:TheBlueSlug/Who should issei end up with?/@comment-79.1.185.111-20140109194025/@comment-1359322-20140121123350

Actually Issei isn't showing any interest in Valerie because of Gasper. Issei knows how Gasper feel about Valerie, and Valerie probably feels the same for Gasper too. So Issei decides to act as a senpai and support Gasper.