Opportunity to make a bet with せっかく〜だから
Grammar Explanation: Taking advantage of an opportunity with せっかく〜だから

Chiya and Cocoa prepare to play chess at a bath house.
- 千夜:
- 「せっかくだから何
( か賭( けてみない?」- “Since we've got the chance, want to bet something?”
See Also
- Grammar: Trying it out with 〜てみる