Choice Arc
The Choice Arc takes place after Tsuna and the rest of his family acquire the Arcobaleno Seals, and travel back into the future to confront Byakuran and the remaining Millefiore Famiglia.
Episodes
155 The Real Six Funeral Wreaths Oct 17, 2009 
156 Inspiring Allies Oct 24, 2009 157 Namimori Holiday Oct 31, 2009 
158 A Warm Place Nov 7, 2009 
159 For My Friends Nov 14, 2009 
160 Gaining Mobility Nov 21, 2009 
161 Airbike Nov 28, 2009 
162 The Sky Vongola Box Dec 5, 2009 
163 Terror! Turmoil on Base Dec 12, 2009 
164 Vongola Box, Training Begins Dec 19, 2009 
165 Boycott Declared Dec 26, 2009 
166 With the Same Heart Jan 9, 2010 
167 Day of the Battle Jan 16, 2010 
168 Choice Begins Jan 23, 2010 
169 Sky Lion: Leone di Cielo ver. Vongola Jan 30, 2010 
170 Fateful Showdown Feb 6, 2010 
171 Revenge Feb 13, 2010 
172 Kikyo's Assault Feb 20, 2010 
173 Choice Ends Feb 27, 2010 
174 The Truth about the Future Mar 6, 2010 
175 Yuni Comes Mar 13, 2010 
176 Escape Mar 20, 2010 
177 After the Battle Mar 27, 2010