Eroge series by Alicesoft. Choukou Sennin Haruka (Beat Blades Haruka), the second game in the series, is also known as the first Alicesoft game to receive an official localization.
The following tags implicate this tag: choukou_sennin_haruka, choukou_shinki_ixseal, choukou_taisen_escalation_heroines, and choukou_tenshi_escalayer (learn more).