Ok.... Episode itself was.......... I don't know if I should call it crap or crazy...
The Bad stuff about this episode:
1. Too much vocal songs = Kind of bad
2. Mecha battle...? Uh........ doesn't really fit...
3. Kizuna/Bond and whatever again...? Doesn't feel right. Doesn't give the same vibe the original manga/novel gives...
4. Too much stuff all stuffed together...
5. So this actually happens after the Three Stories arc...? Suddenly the timeline of the series doesn't seem to make sense...
6. Fail villains were indeed fail........ *FACEPALM*
The Good stuff about this episode:
1. SHOKUHOU MISAKI-SAMA!!!!!!!!!!!!!!!! <3 <3 <3 
2. TOUMA taking his summer lessons LOL
3. Sisters <3 <3 <3 inb4 19090 goes on diet =w=
4. Hyper-Massive Railgun
5. Saten goes on the fight HELL YEAH
6. ITEM! Cho-Super desu!
7. ENDYMION LOL
8. JUDGMENT DESU NO