Strange+

Strange+ (ストレンジ・プラス, Sutorenji Purasu) is a manga series by Verno Mikawa. It has been serialized in Ichijinsha's Josei manga magazine Monthly Comic Zero Sum since the magazine's first issue in March 2002 and has been collected in thirteen tankōbon volumes as of November 2013. An anime television series adaptation by Seven began airing from January 9, 2014. A second season was announced for July.

Plot
Kou comes to a slum neighborhood in search of his elder brother Takumi and finds him to have become the head of a private detective firm. Kou is drafted by Takumi to do errands and chores in the detective firm, and they come to meet various interesting people...