Kyoumei Suru Echo is a collection of shorts from Tsubomi magazine, that are intertwined by mutual acquaintance but otherwise don't intersect. 1. Runner's High (ランナーズハイ)
2. Unbalance (アンバランス)
3. Asymmetry (アシンメトリー)
4-6. Lonesome Echo (ロンサム・エコー)

(Source: Okazu)