The Big ImageBoard (TBIB) - age difference alpha (yukai na nakamatachi) back-to-back bare shoulders black hair blue eyes blush brown eyes brown hair collarbone commentary request dress floral background hair between eyes hairband hand on own knee holding hands idolmaster idolmaster cinderella girls interlocked fingers knee up long hair looking at viewer multiple girls sagisawa fumika signature sitting smile sundress tachibana arisu twitter username white background white dress