Complex sentence: During that time, the kids find Tsukasa who offers his aid though Kotaro's reluctant to request as he reveals the scroll Sieg brought with him has Momotaros on it.
Split into simpler sentences: During that time, the kids find Tsukasa who offers his aid. Kotaro is reluctant to request this, until Tsukasa reveals the scroll Sieg brought with him that has Momotaros on it.